Prior to joining the Department of Justice, Mr. Carroll served as the Chief, Computer Investigations and Operations Branch, Air Force Office of Special Investigations, Washington Field Office where he was responsible for coordinating all national level computer intrusions occurring within the United States Air Force. He has extensive field experience applying his training to a broad variety of investigations and operations. Mr Carroll was also the Special Agent in Charge of the Computer Crimes Unit at the United States Postal Service, Office of Inspector General (OIG), responsible for all computer intrusion investigations within the USPS network infrastructure and for providing all computer forensic analysis in support of OIG investigations and audits as well as the deployment, installation and monitoring of technical computer surveillance equipment in support of criminal investigations.
Mr Carroll was also a recipient of a 2017 Presidential Rank Award  of Meritorious Senior Professional . In addition to his career fighting computer crime, Mr. Carroll has led and assisted in the planning and conduct of counterintelligence inquiries, conducted investigations into a variety of offenses including murder, fraud, bribery, theft, gangs and narcotics. He also co-hosted the first computer forensic, computer security and computer crime podcast Cyberspeak with Bret Padres.