Margaret A. "Peggy" Little

When clients work with David Feldman they benefit from his 50 years of experience – what he has done right as well as lessons learned and knowledge gained. The guiding principle from when he and partner, Dexter Odin, founded the firm was “the client comes first, second, and third.” That principle remains today and has been the foundation of decades-long relationships with clients. Currently, David’s practice focuses on real estate and banking issues where his practical...

Scott Museles is a top attorney recognized by Best Lawyers in the practice area(s) of Business Organizations (including LLCs and Partnerships) and Corporate Law. Scott, who practices law in Potomac, Maryland, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Scott is held by other top lawyers in the same geographic and legal practice area.

Jennifer Eller is co-chair of Groom’s Retirement Services Practice Group and Fiduciary Practice. She’s been with the firm since 1998, beginning as a law clerk, and has been a practicing attorney at Groom since 2000. As a practice group chair, Jenny ensures that the strategic direction and initiatives of the group position Groom to serve the needs of its financial, corporate, and public plan clients. In her practice, she operates from a similar perspective. She advises financial in...

Colleen M. Haddow has been practicing exclusively in the area of family law since 2006. Ms. Haddow focuses her practice on all aspects of family law, including divorce, custody, spousal support, mediation and property settlement agreements. Ms. Haddow regularly appears throughout courts in Northern Virginia representing the interests of her clients. She takes a practical and economical approach to her cases and strives to meet the individual needs of each client. Ms. Haddow thoroughly enjoys ...

Edward Ayoob is a partner and the co-chair of the Federal Relations Group in Barnes & Thornburg's Washington, D.C., office. His work on behalf of clients includes areas such as taxation, appropriations, Native American, small business, foreign affairs, and various regulatory concerns, among numerous other issues. Edward is the former legislative counsel, tax counsel, appropriations manager, and foreign affairs adviser to U.S. Senate Majority Leader Harry Reid (D-NV). He was also the senat...

Michael D. Hausfeld is a top attorney recognized by Best Lawyers in the practice area(s) of Antitrust Law and Litigation - Antitrust. Michael D., who practices law in Washington, District of Columbia, has been recognized since 2006. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Michael D. is held by other top lawyers in the same geographic and legal practice area.

For more information, please visit www.gibsondunn.com/lawyer/harrison-Donald/ .

John Sandweg is a top attorney recognized by Best Lawyers in the practice area(s) of Immigration Law. John, who practices law in Washington, District of Columbia, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which John is held by other top lawyers in the same geographic and legal practice area.

Louis Cohen is a senior counsel in the firm's Litigation/Controversy Department, and a member of the Appellate and Supreme Court Litigation Practice Group. He joined the firm in 1967. Mr. Cohen served as Deputy Solicitor General of the United States from 1986-1988, and focuses on US Supreme Court and other appellate litigation and corporations law. Mr. Cohen’s appellate practice has included more than fifty cases on the merits in the US Supreme Court and a large number of cases in the c...

Brian P. Casson is the founder and Managing Partner of the Northern Virginia Immigration Law Firm, PLLC in Falls Church, VA. Mr. Casson's fearless advocacy and legal acumen have earned him the respect of clients and colleagues alike. He is recognized as a leading immigration attorney in the DC Metropolitan Area and has been both appointed and elected to serve in leadership roles in the American Immigration Lawyer's Association (AILA) from 2017 to present. The Northern Virginia Immigration Law...