Advancement is made on the basis of merit and experience. Within a district office, the top position is that of U.S. marshal. Appointed by the president of the United States, U.S. marshals must be confirmed by the U.S. Senate. Directly under the U.S. Marshal is the chief deputy U.S. Marshal, who oversees the district's staff of supervisors, the deputy U.S. marshals, and the support staff. Each district also employs specialists in witness security, court security, and seized property.
- Airport Security Personnel
- Ambassadors
- Aviation Safety Inspectors
- Bail Bondsmen
- Bailiffs
- Bank Examiners
- Bodyguards
- Border Patrol Agents
- Bounty Hunters
- Campaign Workers
- City Managers
- Civil Engineers
- Congressional Aides
- Construction Inspectors
- Corrections Officers
- Court Interpreters and Translators
- Court Reporters
- Crime Analysts
- Criminal Lawyers
- Cryptographic Technicians
- Customs Officials
- Demographers
- Detectives
- Directors of Security
- Economists
- Emergency Management Directors
- Emergency Medical Technicians
- Emergency Services Dispatchers
- EPA Special Agents
- FBI Agents
- Federal and State Officials
- Fire Inspectors
- Fire Investigators
- Fire Protection Engineers
- Fire Safety Directors
- Fire Safety Technicians
- Firefighters
- Fish and Game Wardens
- Foreign Service Officers
- Forensic Experts
- Forensic Meteorologists
- Forest Fire Prevention Specialists
- Fraud Examiners, Investigators, and Analysts
- Futurists
- Genetic Genealogists
- Health and Regulatory Inspectors
- Intelligence Officers
- Interpreters
- Judges
- Land Trust or Preserve Managers
- Lawyers
- Legal Nurse Consultants
- Legal Secretaries
- Lobbyists
- Military Recruiters
- Military Workers, Enlisted
- National Park Service Employees
- Occupational Safety and Health Workers
- Paralegals
- Park Rangers
- Parole Officers
- Police Officers
- Policy Analysts
- Political Consultants
- Political Scientists
- Polygraph Examiners
- Press Secretaries
- Process Servers
- Recycling Coordinators
- Regional and Local Officials
- Secret Service Special Agents
- Security Consultants
- Security Guards
- Traffic Engineers
- Translators
- Transportation Planners
- Urban and Regional Planners
- Wildland Firefighters