Michael de León Hawthorne

Leon B. Greenfield has an exceptionally wide breadth of experience representing clients in complex antitrust-related matters. He has represented clients in cutting edge Section 2 litigation and agency matters. He has secured antitrust clearance for major acquisitions, litigated cases in federal and state court and counseled clients on many types of antitrust issues. Mr. Greenfield also has broad experience in matters outside the antitrust area, including securities regulatory matters and liti...

Kurt R. Karst provides regulatory counsel to pharmaceutical manufacturers on Hatch-Waxman patent and exclusivity, drug development, pediatric testing, and orphan drugs. He helps clients develop strategies for product lifecycle management, obtaining approval, managing post-marketing issues, and defining periods of exclusivity. As the co-founder and primary author of Hyman, Phelps & McNamara's FDA Law Blog , Mr. Karst often leads the response to new rules and regulations, sharing his interp...

Sharie R. Albers is a top attorney recognized by Best Lawyers in the practice area(s) of Family Law. Sharie R., who practices law in Fairfax, Virginia, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Sharie R. is held by other top lawyers in the same geographic and legal practice area.

Mr. Coleman began his legal career as a Judicial Law Clerk to the Honorable Mary Grace O'Brien in the Prince William County Circuit Court. The clerkship offered an invaluable experience to learn about the litigation process from within the courthouse. Upon completion of his clerkship, Mr. Coleman accepted a job in Fairfax as a trial attorney with a major insurance company where he spent 6.5 years aggressively defending complex personal injury and wrongful death cases. Mr. Coleman returned to ...

A former Assistant United States Attorney, Justin Dillon now uses his years of litigation and investigative experience to defend clients in complex, high-stakes white-collar criminal and campus discipline cases. Justin combines a meticulous approach to investigating the facts with a deep knowledge of criminal and administrative procedure to vigorously protect his clients’ futures and reputations. Justin represents people in some of the toughest situations they will ever face. He has gai...

Thomas A. Cawley, Jr. is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Intellectual Property. Thomas A., who practices law in Washington, District of Columbia, has been recognized since 2016. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Thomas A. is held by other top lawyers in the same geographic and legal practice area.

James Grier Hoyt is a top attorney recognized by Best Lawyers in the practice area(s) of Real Estate Law. James Grier, who practices law in Washington, District of Columbia, has been recognized since 2020. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which James Grier is held by other top lawyers in the same geographic and legal practice area.

Alexander H. Xanttopoulos is a principal attorney with Roop, Xanttopoulos, Babounakis. He joined the predecessor firm in Fall 2010, to focus primarily on family law. He works in cases involving divorce, child custody, support, visitation and equitable distribution. Prior to joining Roop Law, Alex worked for several years for Greenspun, Shapiro, Davis and Leary P.C. as an associate practicing in the areas of domestic relations, traffic, criminal defense and civil litigation. He also has experi...

Erin L. Kopelman is a top attorney recognized by Best Lawyers in the practice area(s) of Collaborative Law: Family Law, Family Law and Family Law Mediation. Erin L., who practices law in Bethesda, Maryland, has been recognized since 2018. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Erin L. is held by other top lawyers in the same geographic and legal practice area.

Sheila A. Millar is a partner at Keller and Heckman LLP, where she represents businesses and trade associations on a variety of public policy and regulatory issues, including privacy, data security, cybersecurity and advertising matters, as well as product safety issues. She has been involved in a variety of audit and compliance projects, including, among other issues, privacy and data security audits, and is experienced in providing crisis management legal support to a variety of national an...