Now serving in his second term, Sheriff Sean Casey is a lifelong resident of Alexandria who has dedicated his professional life to keeping his hometown safe. For 22 years, Sheriff Casey has served as an Alexandria law enforcement officer, first at the Alexandria Police Department and then at the Alexandria Sheriff’s Office before becoming Sheriff in 2022.

In his first term, Sheriff Casey worked with senior leadership and staff throughout the organization to establish a new mission statement, core values and vision for the Office. With a mission of “helping and protecting people” and a vision of “achieving unity with each other and the community,” the Sheriff’s Office team embraces the values of integrity, respect, professionalism and unity and under Sheriff Casey’s leadership, ensures that all work and goals align with our mission.

During his first term, Sheriff Casey further strengthened his excellent relationships with community members and his commitment to those he serves with as well as to those in custody. Sheriff Casey expanded recruiting efforts and established a partnership with the U.S. Army to facilitate employment for former servicemembers; ensured that the Office was reaccredited with distinction by the Commission on Accreditation for Law Enforcement Agencies; relaunched the Sheriff’s Community Academy and implemented measures to safely reopen public visitation at the jail as the pandemic eased; established new employee wellness initiatives with implementation of the ASOFit program and increased mental health training and resources; and expanded programming and partnerships with faith-based and community organizations including Concerned Citizens Network of Alexandria.

Sheriff Casey also oversaw the Adult Detention Center's reaccreditation by American Correctional Association's Commission on Accreditation for Corrections (ACA) and the National Commission on Correctional Health Care (NCCHC), resulting in the Office receiving the Triple Crown Award from the National Sheriffs' Association in 2023. Under Sheriff Casey's leadership, in 2024 the Detention Center attained its first-ever certification for compliance with the federal Prison Rape Elimination Act (PREA).

Committed to keeping staff and inmates safe, in 2023 Sheriff Casey implemented enhanced screening protocols by deploying advanced detection technology and launching the first ever biometric monitoring system in critical areas of the Detention Center. In 2024, he introduced a new K-9 team to detect contraband in the Detention Center and transitioned exclusively to video visitation and secure communications through tablets, eliminating traditional mail service.

With input from the Community Advisory Board, Sheriff Casey reduced inmate fees on phone and tablet services and reduced the threshold for inmates to be identified as indigent and therefore eligible to receive certain canteen items at no cost.

In 2023 Sheriff Casey partnered with the Commonwealth’s Attorney and Clerk of the Circuit Court to make the expungement process more accessible and affordable, with free fingerprint services for petitioners at the courthouse and free joint expungement clinics in 2024 and 2025. He also reestablished the Elementary School Liaison Program to foster positive interactions between deputies and children and serve as a public safety resource to our school communities. In spring 2025, he launched a pilot body-work camera program to expand transparency and accountability. A fiscally minded official, Sheriff Casey negotiated a $785,000 increase in 2025 to the Office’s long-standing contract with the U.S. Marshals Service to house federal inmates at the Detention Center.

Reelected in 2025, Sheriff Casey was appointed to serve on Governor-elect Abigail Spanberger’s transition committee on Public Safety and Homeland Security Policy. He also currently serves as the Chair of the Northern Virginia Criminal Justice Academy’s board of directors and is active with the Alexandria Community Safety Forum.

Highly honored as a police officer, detective and sergeant, Sheriff Casey has continued to receive recognition from community and public safety partners alike. Since becoming Sheriff, he has been honored by Shiloh Baptist Church, Alexandria Redevelopment and Housing Authority, Del Ray Business Association, Alexandria-Washington Lodge No. 22, and U.S. Marshals Service, and was named one of the "Most Interesting Men of 2023" by VIP Alexandria magazine.

A graduate of Virginia Tech, Sheriff Casey continues his professional and leadership development, successfully completing the Leadership in Police Organizations program with the International Association of Chiefs of Police in 2019, earning his Certified Public Management® designation from the George Washington University in 2020, graduating from the Police Executive Research Forum's Senior Management Institute for Police in 2023, and graduating from two National Sheriffs’ Institute programs, Leadership Development in 2024 and Communicating for Impact in 2025.

Beyond his official duties, Sheriff Casey is active with his neighborhood civic association and the Lions Club. He coaches youth sports and volunteers in the Youngins in Progress program to support the educational journeys of Hispanic male students at Alexandria City High.

Sheriff Casey is a graduate of T.C. Williams High School, now Alexandria City High. He lives in the West End with his wife and their children.