United States Postal Inspection Service
The mission of the U.S. Postal Inspection Service is to support and protect the U.S. Postal Service® and its employees, infrastructure, and customers; enforce the laws that defend the nation’s mail system from illegal or dangerous use; and ensure public trust in mail.
Gary R. Barksdale
CHIEF POSTAL INSPECTOR
NATIONAL HEADQUARTERS
Gary R. Barksdale was appointed Chief Postal Inspector for the U.S. Postal Inspection Service in March 2019. In this role, he oversees all operations of the Postal Inspection Service, which includes its National Headquarters, 16 field divisions, two service centers, and a national forensic laboratory. Chief Barksdale is also the chairman of the Universal Postal Union’s Postal Security Group. He reports to the Postmaster General.
Prior to his appointment as Chief, Barksdale served three years as Deputy Chief Inspector at National Headquarters. He was responsible for several of the Postal Inspection Service’s functional areas, including Criminal Investigations; Communications, Governance and Strategy; and Security. He is a Certified Protection Professional (CPP®), considered worldwide as the “gold standard” certification for security management professionals.
Also during his time as Deputy Chief Inspector, Barksdale led the Postal Inspection Service fight against the nation’s opioid epidemic through the newly formed Contraband Interdiction and Investigations Group (CI2), which drives agency strategies to enhance drug interdictions. He was also instrumental in leading the Postal Inspection Service’s strategic planning, managing its responses to critical incidents, and representing the agency before Congress.
Chief Barksdale began his law enforcement career as a police officer in Chesapeake, Virginia, where he served for seven years, including four years as a detective. In 1999, Barksdale was appointed as a United States Postal Inspector. Since then, he has served in the Los Angeles, Houston, Phoenix, and Washington Divisions, as well as at National Headquarters. During his tenure as a Postal Inspector, he conducted numerous criminal investigations of identity theft, mail theft, robbery, and assaults. Barksdale has also held several executive leadership positions within the Postal Inspection Service.
Chief Barksdale received a Bachelor of Science from Old Dominion University. He is a member of the International Association of Chiefs of Police (IACP) and the International Association of Financial Crimes Investigators(IAFCI).
As the primary law enforcement arm of the United States Postal Service, the U.S. Postal Inspection Service is a highly specialized, professional organization performing investigative and security functions essential to a stable and sound postal system.
LOUIS J. DIRIENZO
DEPUTY CHIEF INSPECTOR – HEADQUARTERS
As Deputy Chief Inspector – Security and Crime Prevention, Louis J. DiRienzo is responsible for the Communications, Governance, and Strategy Group, the Domestic and Global Security Headquarters Group, the Career Development Unit, and the Forensic Laboratory Services. Inspector DiRienzo was appointed to this role in April 2025. Before being named Deputy Chief, Inspector DiRienzo served as the Chief Counsel for the U.S. Postal Inspection Service.
Inspector DiRienzo was appointed as a Postal Inspector in 2003, working numerous assignments before joining the Office of Counsel in 2017. Prior to joining the Inspection Service, he was a Sergeant with the Lancaster, Pennsylvania Bureau of Police. Inspector DiRienzo received a Bachelor of Science from the Pennsylvania State University and a Juris Doctor from Widener University. He is a U.S. Army combat veteran, having served with the 82d Airborne Division.
Robert B. Wemyss
DEPUTY CHIEF INSPECTOR
Headquarters, Criminal Investigations
Deputy Chief Robert Wemyss started his Postal Inspection Service career in 1999, as a new Postal Inspector assigned to the Stockton, CA domicile. He was promoted to Deputy Chief Inspector, Western Field Operations in July 2018, and reassigned to oversee the Eastern Field Operations in March 2020. In his current position overseeing Criminal Investigations, DCI Wemyss is responsible for the Criminal Investigations Group, the Contraband Interdiction and Investigations Group, the Cyber and Investigative Technology Group, and the Analytics Group.
Prior to his executive promotion to Deputy Chief, Wemyss served as the Inspector in Charge for the Houston, Los Angeles and Washington Divisions. DCI Wemyss earned his Bachelor of Science Degree in Criminal Justice from Old Dominion University.
Daniel B. Brubaker
A/DEPUTY CHIEF INSPECTOR
Field Ops
Daniel B. Brubaker is the acting Deputy Chief Inspector of the Eastern Field Operations. In this role, Inspector Brubaker is responsible for the strategic and operational management of eight eastern field divisions of the Postal Inspection Service. He has been serving in this role since January 2025.
Inspector Brubaker joined the U. S. Postal Inspection Service as a postal inspector in 1999. In 2011, he was promoted to the position of assistant inspector in charge in Atlanta, GA where he oversaw Inspection Service operations in Tennessee and Georgia. He served in executive leadership positions in Philadelphia and Washington, D.C. before being promoted to the position of Inspector in Charge of the New York Division.
Inspector Brubaker is a proud former U. S. Marine. He also earned a Bachelor of Arts degree from Wittenberg University in Springfield, OH where he achieved a double major in History and Political Science with a minor in Geography.
Rafael Nuñez
DEPUTY CHIEF INSPECTOR
Western Field Operations
Deputy Chief Rafael Nuñez was promoted to oversee the Western Field Operations on July 1, 2024. Inspector Nuñez is responsible for the strategic and operational management of an authorized complement of 941 employees within 8 field divisions. In addition to these law enforcement responsibilities, he holds executive responsibility for leading our National Employee Advisory Team (NEAT).
Inspector Nuñez has 25 years of experience with the Postal Service, all of which have been in law enforcement as a postal inspector. He began his Inspection Service career in 1999 in the Los Angeles division.
Inspector Nuñez holds a Bachelor of Arts degree in Sociology from San Jose State University. He is a graduate of the USPS Advanced Leadership Program and the USPIS Leadership Academy.
Patricia Manzolillo
DIRECTOR
Business Operations
Patricia Manzolillo was named Director, Business Operations by Chief Postal Inspector Gary Barksdale in June 2023. In this position, Patricia is responsible for the strategic and operational management of the business operations of the United States Postal Inspection Service, to include finance, human resources, administrative processes, medical services, and the Security Investigations Service Center, to effectively achieve the Inspection Service mission of “protect, prevent, enforce, and prepare.” Prior to this role, Ms. Manzolillo served as the laboratory director for the Postal Inspection Service’s Forensic Laboratory Services.
Ms. Manzolillo began her affiliation with USPS in 1988, working as a casual employee in the Scarsdale Post Office. She joined the Inspection Service in 1996 as a forensic document examiner in the Memphis Forensic Laboratory and was promoted to assistant laboratory director, National Forensic Laboratory in 2003. Ms. Manzolillo was appointed to the executive level as laboratory director in January 2009 and was responsible for all forensic services supporting Inspection Service investigations. Ms. Manzolillo received a Bachelor of Arts in History from the University of Chicago and a Master of Science in Forensic Science from the University of Alabama at Birmingham.
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