Private investigators who work full-time in investigation agencies may advance to management-level roles, where they may spend less or no time in the field as they supervise the work of other investigators. Many start their own businesses and may advance by increasing their staff and expanding their investigative services by branching out into other specialties. Some enhance their careers by writing articles and books about the field and teaching.
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- Airport Security Personnel
- Armored Truck Drivers
- Cryptographic Technicians
- Directors of Security
- Fire Inspectors
- Fire Investigators
- Forensic Experts
- Internet Security Specialists
- Secret Service Special Agents
- Security Consultants and Guards
- Security Systems Installers and Workers