Derek Lyman currently serves as the Director of Criminal Investigations at the Office of the Commissioner of Insurance and Safety Fire. He earned a bachelor's degree in Criminal Justice from the University of Georgia in 1992 and, in February 2023, completed the Chief Executive Training Class of the Georgia Association of Chiefs of Police.

Lyman began his law enforcement career with the City of Atlanta Police Department in 1992. In June 1996, he joined the U.S. Secret Service, where he served for over 22 years. While in the Atlanta Field Office, he investigated counterfeit currency and financial crimes and was a member of the Nigerian Fraud Task Force and the Protective Operations Squad. In 2000, Lyman transitioned to Washington, D.C., where he worked with the Presidential Protective Detail and Counter Assault Team Program. He later returned to Georgia as a Senior Special Agent in the Macon/Atlanta Field Office, overseeing federal investigations across 18 central Georgia counties and collaborating closely with state and local law enforcement agencies.

In 2018, Lyman became a Compliance Inspector for the Georgia Lottery Corporation. In August 2022, he joined the Office of the Commissioner of Insurance and Safety Fire as the Director of the Criminal Investigations Division.