There are no formal education requirements for most private detective and investigator jobs, although many private detectives have college degrees. Private detectives and investigators typically have previous experience in other occupations. Some work initially for insurance or collections companies, in the private security industry, or as paralegals. Many investigators enter the field after serving in law enforcement, the military, government auditing and investigative positions, or Federal intelligence jobs.
Former law enforcement officers, military investigators, and government agents, who are frequently able to retire after 25 years of service, often become private detectives or investigators in a second career. Others enter from such diverse fields as finance, accounting, commercial credit, investigative reporting, insurance, and law. These individuals often can apply their prior work experience in a related investigative specialty. A few enter the occupation directly after graduation from college, generally with associateís or bachelorís degrees in criminal justice or police science.
The majority of States and the District of Colombia require private detectives and investigators to be licensed. Licensing requirements vary, however: seven StatesAlabama, Alaska, Colorado, Idaho, Mississippi, Missouri, and South Dakotahave no statewide licensing requirements, some States have few requirements, and many other States have stringent regulations. A growing number of States are enacting mandatory training programs for private detectives and investigators. For example, the Bureau of Security and Investigative Services of the California Department of Consumer Affairs requires private investigators to be 18 years of age or older; have a combination of education in police science, criminal law, or justice and experience equaling 3 years (6,000 hours) of investigative experience; pass a criminal history background check by the California Department of Justice and the FBI (in most States, convicted felons cannot be issued a license); and receive a qualifying score on a 2-hour written examination covering laws and regulations. There are additional requirements for a firearms permit.
For private detective and investigator jobs, most employers look for individuals with ingenuity, persistence, and assertiveness. A candidate must not be afraid of confrontation, should communicate well, and should be able to think on his or her feet. Good interviewing and interrogation skills also are important and usually are acquired in earlier careers in law enforcement or other fields. Because the courts often are the ultimate judge of a properly conducted investigation, the investigator must be able to present the facts in a manner that a jury will believe.
Training in subjects such as criminal justice and police science is helpful to aspiring private detectives and investigators. Most corporate investigators must have a bachelorís degree, preferably in a business-related field. Some corporate investigators have a masterís degree in business administration or a law degree, while others are CPAs. Corporate investigators hired by large companies may receive formal training from their employers on business practices, management structure, and various finance-related topics. The screening process for potential employees typically includes a background check for a criminal history.
Some investigators receive certification from a professional organization to demonstrate competency in a field. For example, the National Association of Legal Investigators (NALI) confers the Certified Legal Investigator designation to licensed investigators who devote a majority of their practice to negligence or criminal defense investigations. To receive the designation, applicants must satisfy experience, educational, and continuing-training requirements and must pass written and oral exams administered by the NALI.
Most private-detective agencies are small, with little room for advancement. Usually, there are no defined ranks or steps, so advancement takes the form of increases in salary and assignment status. Many detectives and investigators work for detective agencies at the beginning of their careers and, after a few years, start their own firms. Corporate and legal investigators may rise to supervisor or manager of the security or investigations department.