Mark J. Moseley is a seasoned criminal defense attorney based in Alexandria, Virginia, specializing in white-collar crimes, federal prosecutions, and complex litigation. As a partner at Zwerling, Leibig & Moseley, P.C., he focuses on defending clients in high-profile federal cases involving fraud, corruption, money laundering, and regulatory offenses. His practice draws on extensive experience in navigating the federal court system, particularly in the Eastern District of Virginia. Moseley's approach emphasizes strategic defense tactics, thorough investigation, and negotiation to achieve favorable outcomes for his clients, including dismissals, acquittals, and reduced sentences.

Before entering private practice, Moseley served as an Assistant United States Attorney in the Eastern District of Virginia, where he prosecuted federal criminal cases, gaining invaluable insight into government strategies and evidentiary standards. This prosecutorial background informs his current work, allowing him to anticipate and counter prosecution tactics effectively. He is a graduate of the University of Virginia School of Law and has been admitted to practice in multiple jurisdictions, including Virginia and the District of Columbia. Moseley collaborates closely with partners like John K. Zwerling, contributing to the firm's strong track record in defending individuals and corporations against federal investigations.

Throughout his career, Moseley has been involved in notable cases that highlight his expertise in white-collar defense, though he maintains a relatively low public profile outside of professional circles. His work underscores the firm's commitment to zealous representation in an era of increasing regulatory scrutiny.