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On January 31, 2022, Alfonso M. Dyson, Sr., was sworn in by U.S. Secret Service Director James M. Murray to serve as the agency’s 21st Chief of the Uniformed Division (UD). Prior to this promotion, Chief Dyson served UD as assistant chief, a position he held from March 2019 to January 2022.

Chief Dyson began his federal career as a federal police officer with the Secret Service Uniformed Division in February 1990. Following his training at the Federal Law Enforcement Training Center and the James J. Rowley Training Center, he was assigned to the White House Branch. In February 1997, Officer Dyson was promoted to the rank of sergeant and served at the White House Branch. In February 2000, he was promoted to the rank of lieutenant and remained at the White House for a brief period before his reassignment to Secret Service Headquarters, where he served in the Office of Chief as the vehicle fleet coordinator and administrative special projects coordinator. During his tenure as a lieutenant, Dyson served as the ranking member in charge of the Uniformed Division’s Recruitment Division and Honor Guard program.

Subsequent promotions to captain and inspector led Chief Dyson to a variety of leadership roles throughout the agency, including positions with the Secret Service’s Foreign Missions Branch (FMB), the FMB Office of the Deputy Chief and the Office of Government and Public Affairs. While there, he was detailed to the U.S. Capitol and worked closely with members of Congress, the House Sergeant-At-Arms, the Senate Sergeant-At-Arms, as well as ranking members of the U.S. Capitol Police. In January 2013, Inspector Dyson was transferred to the Secret Service Office of Professional Responsibility, Inspection Division, where he served until his promotion to deputy chief in January 2015 and assumed the high-profile leadership position of branch commander for the White House Branch.

Over the course of his 32-year career, Chief Dyson has been the recipient of numerous performance awards and commendations. He is a graduate of the FBI National Academy, the FBI National Executive Institute, and a member of the International Association of Chiefs of Police.