Field investigators also called as private investigators, do surveillance and research for a corporation, law enforcement agency or individual clients.
With a given case, a field investigator carries out interviews and observation on a given situation to determine the nature of what is happening for a client.

Required Education High school diploma or equivalent; associate's and bachelor's degrees available
Other Requirements Related work experience; licensure required by most states
Projected Job Growth (2012-2022) 11% for all private detectives and investigators
Median Salary (2013) $46,250 for all private detectives and investigators

Field investigators working with a law enforcement agency or with a corporation characteristically need a bachelor's degree.
If a field investigator specializes in a definite type of investigation, then obtaining a degree in that area is recommended.

Field investigators commonly own offices where clients are met or interviews are performed.
Training work is done in this office, including online research or phone calls.
However, once an investigator moves out to the field, the work place could be anything.

They are employed to go out into the world and discover information related to a client or employer's wishes.
Exact job duties vary by investigation, but core tasks are usually the same.
A field investigator performs research online, at libraries and by referencing creative sources to track down information or addresses.
Once in the field, a field investigator can spend time following and observing a person with surveillance