Historians in specific professions, such as a teacher or a federal employee, can join unions (such as the American Federation of Teachers and the National Education Association) that represent workers in their field. In addition to these groups, there are professional and nonprofit organizations that offer membership and opportunities in career development and certification, including the American Historical Association, American Association of University Professors, American Association for State and Local History, Organization of American Historians, and National Council for History Education.
- Anthropologists
- Arborists
- Archaeologists
- Archivists
- Artists
- Book Conservators
- Botanists
- Civil Engineers
- Conservators and Conservation Technicians
- Demographers
- Ecologists
- Economists
- Education Directors and Museum Teachers
- Environmental Education Program Directors
- Environmental Lawyers
- Environmental Planners
- Environmental Restoration Planners
- Environmental Scientists
- EPA Special Agents
- Ethnoscientists
- Exhibit Designers
- Fish and Game Wardens
- Foresters
- Forestry Technicians
- Futurists
- Gallery Owners and Directors
- Genealogical Researchers
- Genealogists
- Geographers
- Geological Technicians
- Geologists
- Geophysicists
- Grant Coordinators and Writers
- Grounds Managers
- Historic Preservationists
- Land Acquisition Professionals
- Land Trust or Preserve Managers
- Landscapers
- Lexicographers
- Linguists
- Marine Biologists
- Medical Ethicists
- Museum Attendants
- Museum Directors and Curators
- Museum Technicians
- National Park Service Employees
- Naturalists
- Occupational Safety and Health Workers
- Park Rangers
- Political Scientists
- Range Managers
- Recreation Workers
- Rewilders
- Sociologists
- Soil Conservationists and Technicians
- Soil Scientists
- Statisticians
- Taxidermists
- Tour Guides
- Wildland Firefighters
- Zoo and Aquarium Curators and Directors
- Zookeepers
- Zoologists