To understand how to prepare for your chosen career in natural resources or environmental management, one of the simplest things you can do is check the federal qualifications for your preferred career path.
The Office of Personnel Management (OPM) has determined education and experience requirements for thousands of job families (“occupational series”) that you can use as a template for becoming a qualified entry-level candidate in your field, whether or not you ultimately intend to seek employment in federal service. Although OPM is continuously retiring outmoded occupational series, their standards are still useful as a general planning tool.
As you explore some of the careers listed here, make sure you verify the qualifications with OPM to see if they have been updated since this guide was developed.
General Natural Resources Management and Biological Sciences
This series contains several occupations within natural resource management: biologists, NEPA planners, environmental coordinators, interdisciplinary researchers and others.
What are the education requirements? (Verify with OPM: 0401)
General Natural Resources Management Requirements
Grade
Education Requirement
GS03
One year of higher education
GS04
Two years of higher education
GS05
A four year degree in biological sciences, agriculture, natural resource management, chemistry or a related discipline
GS07
The same four year degree with Superior Academic Achievement (SAA) OR One year of related graduate education
Which majors at Boise State University can fulfill these requirements?
Assisting in the preparation of environmental assessments or environmental impact statements; or, evaluating compliance with environmental laws and regulations; or, performing field work to identify existing environmental conditions and factors that could impact those conditions.
Careers in range management involve monitoring changes to rangeland health (e.g., grazing impacts, invasive species), preparing livestock management plans and working closely with permittees to ensure compliance with management plans. Positions vary in the level of field work required, but most involve some work outdoors in rough terrain.
What are the education requirements? Verify with OPM: 0454
Rangeland Management Requirements
Grade
Education Requirement
GS03
One year of higher education
GS04
Two years of higher education
GS05
A four year degree, including
Rangeland management: 18 credit hours
Plant, animal and soil sciences: 15 credit hours
Resource management: 9 credit hours
GS07
The same four year degree with Superior Academic Achievement (SAA) OR One year of related graduate education
Which majors at Boise State University can fulfill these requirements?
Boise State University does not currently offer a major that can fulfill these requirements.
Boise State University students interested in careers in rangeland management can qualify for GS-03 and GS-04 openings for range technicians with relevant coursework offered at Boise State.
Biology and Chemistry meet the requirements of closely related occupations (see: General Natural Resources Management and Biological Sciences).
What does competitive experience look like?
Assist with grazing applications and permits, on-the-ground use supervision, plan and conduct range studies, plan range & watershed improvements, conduct trespass investigations, consult with livestock operators & prepare land use planning documents.
Realty specialists acquire, manage and dispose of property as part of public lands programs and water projects, for use in office changes or expansions, special purposes, or for general storage space (OPM, 1993). A valid driver’s license may be required.
What are the education requirements? Verify with OPM: 1170
Realty Specialist Requirements
Grade
Education Requirement
GS03
One year of higher education
GS04
Two years of higher education
GS05
A four year degree
GS07
The same four year degree with Superior Academic Achievement (SAA)
OR
One year of related graduate education with at least one course in outdoor recreation
Which majors at Boise State University can fulfill these requirements?
Any major is acceptable, however recommended majors include
Geographers gather and integrate geographic information from field observations, satellite imagery, photographs, maps and other sources. They may conduct qualitative research to better understand local populations and stakeholders, write articles and reports and assist or lead others in using and interpreting GIS and geographic data (Bureau of Labor Statistics, Geography, 2018).
What are the education requirements? (Verify with OPM: 0150)
Geography Requirements
Grade
Education Requirement
GS03
One year of higher education
GS04
Two years of higher education
GS05
A four year degree in geography, or a related physical or social science such as geology, meteorology, economics, statistics, sociology, anthropology, political science, history, cartography, computer science, urban studies, or planning that included at least 24 semester hours in geography or related fields.
GS07
The same four year degree with Superior Academic Achievement (SAA)
OR
One year of related graduate education with at least one course in outdoor recreation
Which majors at Boise State University can fulfill these requirements?
With 24 credit hours in geography and related courses, these majors will fulfill education requirements:
Involvement in the collection and identification of geographic information concerning the exact location and place names of physical and cultural features, population changes during a specified time period in a given place or area, and changes in topographic features.
Cartographers collect and interpret geographic information to create and update maps. They integrate data from geodetic surveys, aerial and satellite remote sensing systems, and LIDAR systems to develop highly detailed, accurate maps (Bureau of Labor Statistics, Cartography 2017).
What are the education requirements? (Verify with OPM: 1370)
Cartography Requirements
Grade
Education Requirement
GS03
One year of higher education
GS04
Two years of higher education
GS05
A four year degree in cartography or major that included30+ hours in cartography and/or astronomy, geodesy, photogrammetry, physical and geological oceanography, computer science, land surveying, geophysics, physical geography, and remote sensing, includingBetween 6 and 15 hours of college level mathematics or statistics (e.g., college level algebra, trigonometry, calculus, or scientific mathematics or statistics requiring equivalent college-level courses as prerequisites)
GS07
The same four year degree with Superior Academic Achievement (SAA)
OR
One year of related graduate education
Which majors at Boise State University can fulfill these requirements?
With the 30+ credit hours of required coursework, these majors will fulfill education requirements:
Geophysics Minor (This minor meets 20 of 30 required credit hours, with 0 of 6 required credit hours for math and statistics.)
Computer Science Minor (This minor provides 25 of 30 required credit hours. You might add GEOG 360 Introduction to GIS and GEOG 361 Remote Sensing to meet occupational education requirements.)
What does competitive experience look like?
Performing a series of sequential tasks/steps for standardized or prescribed operations involving one or more stages of the map or chart making process (e.g., orienting stereo plotting instruments to develop expertise, compiling less difficult map or chart manuscripts, or drafting and scribing maps or charts).
Seasonal and permanent positions under this occupational series are plentiful in the West and can provide surveying experience equally relevant to positions in the land surveying series.
What are the education requirements? (Verify with OPM: 0817)
Survey Technical Requirements
Grade
Education Requirement
GS03
One year of higher education
GS04
Two years of higher education
GS05
A four year degree in a related discipline (e.g., construction management, civil engineering) or
24+ semester hours in surveying, engineering, industrial technology, construction, physics, drafting, forestry, geography, navigation, cartography, physical science, or mathematics.
GS07
The same four year degree with Superior Academic Achievement (SAA)
OR
One year of related graduate education
Which majors at Boise State University can fulfill these requirements?
Any major with the addition of the 24 required credit hours
What does competitive experience look like?
Experience working in any professional, technical, or other responsible field that provided you with a familiarity of land surveying techniques.
Serving as rodman on surveys requiring special rodding procedures, using any of various types of rods, and selecting measuring or turning points in consideration of terrain and demands of the type of survey involved.
Serving as pacer of a leveling party.
Going ahead of the party and determining in advance the positions the road crew will occupy so that shots will be balanced and instruments can be kept level.
“Surveyors make precise measurements to determine property boundaries. They provide data relevant to the shape and contour of the Earth’s surface for engineering, mapmaking, and construction projects.” (Bureau of Labor Statistics, 2017)
What are the education requirements? (Verify with OPM: 1373)
Land Surveying Requirements
Grade
Education Requirement
GS03
One year of higher education
GS04
Two years of higher education
GS05
A four year degree in land surveying or civil engineering with a surveying emphasis, including
6+ hours of surveying,
3+ hours of land law,
21+ hours across surveying, photogrammetry, geodetic surveying, geodesy, route surveying, remote sensing, cartography, survey astronomy, land information systems, computer-aided mapping, aerial photo interpretation, and survey analysis and adjustments.
GS07
The same four year degree with Superior Academic Achievement (SAA)
OR
One year of related graduate education
Which majors at Boise State University can fulfill these requirements?
Boise State University does not offer all coursework to fulfill these requirements at this time, as no land law course is currently offered. A state land surveyor’s license can substitute for this education, however. Land surveying licensure in Idaho requires 4 years of land surveying experience and passage of an exam on land surveying fundamentals.
The Survey Technical occupational series provides an entry point to gain relevant surveying experience with coursework requirements that can be met at Boise State.
What does competitive experience look like?
Assisting in verification of survey data including measurements and calculations conducted as survey sites.
Preparing data, charts, plots, maps, records and documents related to surveys.
Using specialized instruments including transit theodolites, altimeters, and GPS systems.
Soil scientists collect and examine soil samples to improve agricultural processes and develop environmental assessments. Soil scientists with a Bachelor’s degree generally spend most of their working hours engaged in fieldwork, while those with higher level degrees spend more hours working in the lab.
What are the education requirements? (Verify with OPM: 0457)
Soil Conservation Requirements
Grade
Education Requirement
GS03
One year of higher education
GS04
Two years of higher education
GS05
A four year degree in soil conservation or related agricultural or natural resource discipline such as agronomy, soil science, forestry, agricultural education, or agricultural engineering
OR
30 semester hours in a natural resource or agricultural field, including 12+ semester hours in a combination of soils and crops or plant science, including
3+ semester hours in soils
3+ semester hours in crops or plant science.
GS07
The same four year degree with Superior Academic Achievement (SAA)
OR
One year of related graduate education
Which majors at Boise State University can fulfill these requirements?
With required coursework, this major can fulfill requirements:
Archaeologists collect and analyze samples and data to better understand the archeological remains of human settlements and natural ecosystems. They record field observations, prepare reports, and present research. Some may manage cultural resource and historical preservation programs (Bureau of Labor Statistics, 2018).
What are the education requirements? (Verify with OPM: 0193)
Archeology Requirements
Grade
Education Requirement
GS03
One year of higher education with related coursework
GS04
Two years of higher education with related coursework
GS05
A four year degree, including
Three credit hours each in
History of archeology.
Archeology of a major geographical area such as North America or Africa.
Regional archeology, archeological cultures, or sites in a specific part or portion of a major geographical area to acquire or develop a foundation for regional specialization for professional development.
Theory and methods of archeology.
Archeological field school.
Six credit hours of related coursework in geography, geology, or cultural geography; history, historiography, or historical archeology; environmental studies; scientific writing (nonfiction English composition); and or surveying.
GS06
One year of related graduate education
Which majors at Boise State University can fulfill these requirements?
With required coursework, this major can fulfill education requirements:
Anth 312 Prehistory of North America or Anth 320 Latin American Prehistory
Anth 420 Geoarcheology or Anth 418 Quantitative Field Methods
Anth 490 Archeological Field School
Six semester hours in geography, geology, or cultural geography; history, historiography, or historical archeology; environmental studies; scientific writing (nonfiction English composition); and/or surveying.
What does competitive experience look like?
Assisting with on-the-ground field studies to identify cultural, historic and/or paleontological resources and reporting findings to supervisor; and using designated, well established guidelines to compute, compile, and present archaeological data in field notes. (GS-4)
Assisting professional archaeologist in performing actual field studies; and carrying out field studies to identify cultural, historic and/or paleontological resources for planning systems regarding cultural resources. (GS-5)
Foresters manage timber resources by developing annual work plans, conducting on-the-ground surveys, reviewing logging plans for compliance with contract terms, and inspecting logging operations. Fieldwork, often performed alone, is a large part of the job. Foresters frequently work with other specialists to monitor logging operations and their impacts and resolve problems as they arise.
What are the education requirements? (Verify with OPM: 0460)
Forestry requirements
Grade
Education Requirement
GS03
One year of higher education
GS04
Two years of higher education
GS05
A four-year degree, including 30+ hours of coursework in biological, physical, or mathematical sciences or engineering, 24+ hours in forestry, including renewable resource management, Forest biology, Forest resource measurements and inventory
GS07
The same four year degree with Superior Academic Achievement (SAA) OR one year of related graduate education
Which majors at Boise State University can fulfill these requirements?
Students interested in pursuing careers in forestry may wish to major in Biology with a pre-forestry and pre-wildlife management emphasis before transferring to University of Idaho’s forestry program.
What does competitive experience look like?
Assisting higher-level foresters or working as a team member in accomplishing selected portions of forestry projects such as timber sale contracts, laying out unit boundaries, or cruising and marking timber,
Ensuring all contract provisions are enforced in accordance with contract objectives,
Conducting cruises of timber stands to determine volume of merchantable timber, species composition, accessibility, and environmental constraints,
Performing related timber sale preparation, timber stand improvement, and reforestation duties.
Outdoor recreation planners design recreation programs, recommend recreation activities appropriate for the land, write environmental reports, and manage and suggest improvements for current recreation facilities. They generally work in an office and in the field. Their day-to-day work requires both project management and communication skills.
What are the education requirements? (Verify with OPM: 0023)
Outdoor Recreation Planning Requirements
Grade
Education Requirement
GS03
One year of higher education
GS04
Two years of higher education
GS05
A four year degree in outdoor recreation planning, sociology, forestry, landscape architecture, economics, biological science, park administration, earth science, natural resource management and conservation, civil engineering, urban planning, or recreation.
GS07
The same four year degree with Superior Academic Achievement (SAA)
OR
One year of related graduate education
Which majors at Boise State University can fulfill these requirements?
Experience that provided a knowledge of the requirements and practices of outdoor recreation planning or natural resource utilization and conservation.
Analysis and evaluation of outdoor recreation interests, habits, and needs of diversified groups, and the means for meeting those needs.
Evaluation of land or water areas for their recreation and related potential use, such as wildlife reserve.
Preparation or review of plans and programs for natural resource utilization and recreation area development.
Solution of administrative, intergovernmental, socioeconomic, and other problems involved in providing adequate recreation opportunities while preserving, restoring, and enhancing the quality of the outdoor environment.
Park rangers manage conservation programs within federal parks and develop informational and recreational programs for park visitors. In addition to natural resource management, work frequently includes responsibilities related to historical and cultural resource management, law enforcement, and visitor programs development (OPM, 1985).
What are the education requirements? (Verify with OPM: 0025)
Park Ranger Requirements
Grade
Education Requirement
GS03
One year of higher education with 6 semester hours of related coursework
GS04
Two years of higher education with 12 semester hours of related coursework
GS05
A four year degree with 24 hours of related coursework. Appropriate majors include outdoor recreation planning, sociology, forestry, landscape architecture, economics, biological science, park administration, earth science, natural resource management and conservation, civil engineering, urban planning, or recreation.
GS07
The same four year degree with Superior Academic Achievement (SAA)
OR
One year of related graduate education
Which majors at Boise State University can fulfill these requirements?
The park ranger series has additional experience requirements that education may not substitute.
Additional Park Ranger Experience Requirements
Grade
Experience Requirement
–
General
Specialized
GS03
6 months
3 months
GS04
6 months
6 months
GS05
None
1 year equivalent to GS-4
GS07
None
1 year equivalent to GS-5
Specialized experience that demonstrated the knowledge, skills, and abilities necessary to perform successfully the duties of the position to be filled, such as
Park guide or tour leader.
Law enforcement or investigative work.
Archeological or historical preservation research work.
Forestry and/or fire management work in a park, recreation, or conservation area.
Management, assistant, or program specialist work involving the development and implementation of policy related to protection, conservation, or management of park areas or similar operations.
Guides lead excursions and talks for visitors to national parks and dams. They combine their public speaking skills with historical knowledge of the local area to engage and educate the public.
What are the education requirements? (Verify with OPM: 0090)
Guide Requirements
Grade
Education Requirement
GS03
One year of higher education with 6+ semester hours in courses such as American history, science, and/or public speaking
GS04
Two years of higher education with 12+ semester hours in American history, science and/or public speaking
GS05
A four year degree with 12+ semester hours in American history, science and/or public speaking
GS07
The same four year degree with Superior Academic Achievement (SAA)
OR
One year of related graduate education
Which majors at Boise State University can fulfill these requirements?
Hydrologists monitor, restore and protect water resources. They manage programs to monitor water quality and complete environmental reports that advise how damaged watersheds can be rehabilitated. Hydrologists spend many working hours taking samples in the field, and they often collaborate with other natural resource specialists to develop comprehensive land management plans.
What are the education requirements? (Verify with OPM: 1315)
Hydrology requirements
Grade
Education Requirement
GS03
One year of higher education
GS04
Two years of higher education
GS05
A degree in a physical science, natural science, or engineering, including
30+ hours of courses in hydrology, the physical sciences, geophysics, chemistry, engineering science, soils, mathematics, aquatic biology, atmospheric science, meteorology, geology, oceanography, or the management or conservation of water resources, including
6+ hours of calculus (differential and integral)
6+ hours of physics
GS07
The same four year degree with Superior Academic Achievement (SAA)
OR
One year of related graduate education
Which majors at Boise State University can fulfill these requirements?
Geosciences with a hydrology emphasis.
What does competitive experience look like?
Field or laboratory work that required application of hydrologic theory and related sciences such as geology, geo-chemistry, geophysics, or civil engineering to make observations, take samples, operate instruments, assemble data from source materials, analyze and interpret data, and report findings orally and in writing.
Wildlife biologists manage, monitor and improve wildlife habitat by conducting studies and surveys, coordinating efforts with other agencies, tribes, and the public, and working closely with other specialists to develop management plans. Their work is often connected to the Endangered Species Act: for example, a wildlife biologist might research the impact of planned agency actions on the habitat of threatened and endangered species and prepare a biological opinion to document these findings.
What are the education requirements? (Verify with OPM: 0486)
Wildlife Biology Requirements
Grade
Education Requirement
GS03
One year of higher education
GS04
Two years of higher education
GS05
A Bachelor of Science in a biological science with
9+ hours in wildlife subjects (mammalogy, ornithology, animal ecology, wildlife management, or research courses)
12+ hours in zoology in such subjects as general zoology, invertebrate zoology, vertebrate zoology, comparative anatomy, physiology, genetics, ecology, cellular biology, parasitology, entomology, or research courses
9+ hours in botany or the related plant sciences
GS07
The same four year degree with Superior Academic Achievement (SAA)
OR
One year of related graduate education
Which majors at Boise State University can fulfill these requirements?
Biology with Ecology, Evolution and Behavior emphasis
What does competitive experience look like?
Assist in conducting field surveys in remote locations to document and assess animal presence, abundance, reproduction, and population dynamics using established protocols and standard scientific equipment
Recording and analyzing wildlife data using computer software (such as Microsoft Access, Excel, Word, ArcGIS, Pathfinder Office, or comparable)
Fish biologists develop and manage programs to protect and improve fish habitat. They conduct studies and surveys, monitor and evaluate efforts to improve fish habitats, and coordinate with other specialists to develop programs that protect fish habitat and meet other agency goals (e.g., maintain a popular recreation area). Like wildlife biologists, their work often involves managing projects to evaluate potential impacts of planned action to the habitat of threatened and endangered species.
What are the education requirements? (Verify with OPM: 0482)
Fish Biology Requirements
Grade
Education Requirement
GS03
One year of higher education
GS04
Two years of higher education
GS05
A Bachelor of Science in a biological science with
6+ hours in aquatic subjects like limnology, ichthyology, fishery biology, aquatic botany, aquatic fauna, oceanography, fish culture, or related courses in fishery biology
12+ hours in zoology in such subjects as general zoology, vertebrate zoology, comparative anatomy, physiology, entomology, parasitology, ecology, cellular biology, genetics, or research courses in these fields.
GS07
The same four year degree with Superior Academic Achievement (SAA)
OR
One year of related graduate education
Which majors at Boise State University can fulfill these requirements?
Biology with Ecology, Evolution and Behavior emphasis
What does competitive experience look like?
Field or laboratory work that provided a means of obtaining professional knowledge of the theory and application of the principles of fishery biology and closely related sciences,
For example, making close observations, taking samples, handling various types of instruments and equipment, assembling fishery data from source materials, and analyzing and reporting findings.
Ecologists conduct studies and surveys to better understand ecosystems and the interrelationships between the plant and animal species within them. They may spend the morning collecting samples in the field and the afternoon recording and analyzing the day’s sample data in a lab or office. They frequently work with other specialists to develop management plans and engage in outreach to educate the public about their work.
What are the education requirements? (Verify with OPM: 0408)
Ecology Requirements
Grade
Education Requirement
GS03
One year of higher education
GS04
Two years of higher education
GS05
A Bachelor of Science in biology
OR
A BS in another science field underlying ecological research with
30+ credit hours in biological sciences, including
9+ credit hours in ecology
12+ credit hours in physical and mathematical sciences
GS07
The same four year degree with Superior Academic Achievement (SAA)
OR
One year of related graduate education
Which majors at Boise State University can fulfill these requirements?
Biology with Ecology, Evolution and Behavior emphasis
What does competitive experience look like?
Collecting basic data from field investigations,
Preparing samples,
Making observations on biological conditions,
Assisting in data entry and routine data analysis,
Searching published technical sources for information on designated topics and preparing summaries for reference of others.
Wildlife refuge managers oversee all programs active within their refuge, like habitat management and restoration, invasive species management, prescribed fire management, and visitor services planning. Wildlife refuge specialists and other refuge staff work with the refuge manager to develop and manage habitat management plans, visitor services plans, and public use programs (e.g., hunting, fishing). Wildlife refuge specialists and managers utilize collaborative problem solving to develop and improve programs for refuge wildlife and visitors while meeting administrative demands.
Similar to other natural resource specialists, geologists investigate the geologic characteristics of land under management to ensure geological factors are considered in management plans and operations. For example, they inspect mining operations, monitor lands leased for mineral extraction, collect and analyze field data, and present their findings to others.
What are the education requirements? (Verify with OPM: 1350)
Geology requirements
Grade
Education Requirement
GS03
One year of higher education
GS04
Two years of higher education
GS05
A degree in geology and
20+ hours of coursework in mathematics, physics, chemistry, biological science, structural, chemical, civil, mining or petroleum engineering, computer science, planetary geology, comparative planetology, geophysics, meteorology, hydrology, oceanography, physical geography, marine geology, and cartography.
GS07
The same four year degree with Superior Academic Achievement (SAA)
OR
One year of related graduate education
Which majors at Boise State University can fulfill these requirements?
Geosciences with a geology emphasis
What does competitive experience look like?
Performing field studies to gather geological samples and data
Assisting with geological studies and surveys
Interpreting and analyzing results to determine the validity and scientific significance of the data
Management and program analysis professionals develop performance measures for program evaluation, track the progress of programs, recommend changes to programs to improve efficiency and effectiveness, and participate in strategic planning to ensure programs adapt as needs change.
What are the education requirements? (Verify with OPM: 0343)
Management and Program Analysis Requirements
Grade
Education Requirement
GS03
One year of higher education
GS04
Two years of higher education
GS05
A four year degree
GS07
The same four year degree with Superior Academic Achievement (SAA)
OR
One year of related graduate education
Which majors at Boise State University can fulfill these requirements?
Any major can fulfill these requirements. Recommended majors:
Grants management specialists award and administer federal grants. Typical duties include developing metrics for applicant and awardee evaluation, advising program officials, applicants, and awardees throughout the grant lifecycle, and negotiating terms and conditions of agreements.
What are the education requirements? (Verify with OPM: 1109)
Grants Management Requirements
Grade
Education Requirement
GS03
One year of higher education
GS04
Two years of higher education
GS05
A four year degree
GS07
The same four year degree with Superior Academic Achievement (SAA)
OR
One year of related graduate education
Which majors at Boise State University can fulfill these requirements?
Any major can fulfill these requirements. Recommended majors:
Environmental protection specialists help federal agencies carry out their responsibilities under various environmental laws. Their work generally focuses on one or more of the following activities: developing rulemaking and procedural guidelines, managing compliance programs, developing environmental impact reports, and overseeing environmental programs (OPM, 1995).
What are the education requirements? (Verify with OPM: 0028)
Environmental Protection Specialist Requirements
Grade
Education Requirement
GS03
One year of higher education
GS04
Two years of higher education
GS05
A four year degree
GS07
The same four year degree with Superior Academic Achievement (SAA)
OR
One year of related graduate education
Which majors at Boise State University can fulfill these requirements?
Any major can fulfill these requirements. Recommended majors:
This occupational series includes diverse careers that are in demand at the Bureau of Land Management, Bureau of Reclamation, and National Park Service. Because it functions as a catch-all series, examples of related specialized experience vary widely. Many positions listed under this series are not related to natural resource management, so filtering your job search by agency is recommended.
Planning and environmental coordinators may provide NEPA program analysis, training, guidance and oversight, while recreation management specialists and program managers are often responsible for implementing specific land use programs, managing permitting and NEPA compliance.
What are the education requirements? (Verify with OPM: 0301)
Misc. Administration and Program Requirements
Grade
Education Requirement
GS03
One year of higher education
GS04
Two years of higher education
GS05
A four year degree
GS07
The same four year degree with Superior Academic Achievement (SAA)
OR
One year of related graduate education
Which majors at Boise State University can fulfill these requirements?
Any major can fulfill these requirements. Recommended majors:
Competitive experience can differ widely in this series. Broadly speaking, work that involves project management, interpreting relevant statutes and regulations, and exposure to permitting procedures is likely to be considered relevant.