The phrase "a field agent" is correct and usable in written English.
It can be used to refer to an operative or representative who works in the field, often in contexts related to intelligence, law enforcement, or research.
Example: "The organization deployed a field agent to gather information on the ground and report back to headquarters."
Alternatives: "an operative" or "a field operative."
Benji, who claims to be a field agent, is terrified when he's not mystified.
Mrs. Sampson's first marriage to Rufus Sampson, a field agent for Tuskegee Institute in Alabama, ended in divorce.
No -- she looks at her enslavement as an opportunity to prove her talents as a field agent.
The best evidence is a report to Anslinger by a field agent on the 1934-35 hemp crop in Minnesota.
The official said that the alert had been based on a report from a field agent and that the agency was investigating its legitimacy.
"The gun was legal," said John Morgan, a field agent in the Albany office of the Bureau of Alcohol , Tobacco and Firearms which is assisting in the investigation.
"The Recruit," directed by Roger Donaldson, is about a young computer wizard (Colin Farrell) who is recruited for the C.I.A.'s field operations training program by Mr. Pacino's Walter Burke, a former field agent with a murky past and a cloudier present.
In "Zero Dark Thirty," the masterly new movie directed by Kathryn Bigelow and written by Mark Boal, a C.I.A. field agent has an Al Qaeda operative in his grip.
Already he's missed his cousin's goshdern ceremony and the grape-juice toasts and the… In "Zero Dark Thirty," the masterly new movie directed by Kathryn Bigelow and written by Mark Boal, a C.I.A. field agent has an Al Qaeda… "White folks, some young white folks, they run away from America," Joe Brown, the father of James Brown, once said.
A: No. Bullock plays an FBI field agent named Sarah Ashburn.
An investment banker and a Justice Department field agent are caught in a nightmare of murderous political intrigue.
