Robert C. Tapparo

Michael A. Hass is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation. Michael A., who practices law in McLean, Virginia, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Michael A. is held by other top lawyers in the same geographic and legal practice area.

With nearly two decades of experience in government and private practice, Matthew Kulkin is well positioned to help financial market clients navigate complex legislative, regulatory, compliance and enforcement issues. Mr. Kulkin joined the firm in 2022 from another international law firm where he co-chaired its financial services practice group. Before that, he served as the Director of the US Commodity Futures Trading Commission's Division of Swap Dealer and Intermediary Oversight.

Maria Simon is an award-winning attorney who serves as the firm’s Managing Partner. While Maria’s practice is quite versatile, she specializes in family law, divorce, custody disputes, Collaborative Divorce, business law, and litigation. Frequently appearing in court nationwide on behalf of her clients, Maria has considerable experience in the Federal District Court, U.S. Court of Appeals, Bankruptcy Court, and the State courts of Virginia, District of Columbia, and Maryland. She ...

William Walsh is a top attorney recognized by Best Lawyers in the practice area(s) of Business Organizations (including LLCs and Partnerships), Closely Held Companies and Family Businesses Law and Corporate Law. William, 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 William is held by other top lawyers in the same geographic and legal practice area.

Darlene S. Lesser is a top attorney recognized by Best Lawyers in the practice area(s) of Family Law. Darlene S., 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 Darlene S. is held by other top lawyers in the same geographic and legal practice area.

Perry Lange represents clients in diverse antitrust matters before US courts, the US Department of Justice and Federal Trade Commission, state attorneys general and Congress. He has extensive experience litigating antitrust cases, including trials and appeals, securing merger clearance, and defending state and federal investigations. He has also represented a diverse set of clients in antitrust policy matters such as congressional investigations and hearings in both the House and Senate, incl...

Barak Cohen is a top attorney recognized by Best Lawyers in the practice area(s) of Criminal Defense: White-Collar. Barak, 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 Barak is held by other top lawyers in the same geographic and legal practice area.

Marina excels in dealing with international and complex family law matters. She is a Fellow of the American Academy of Matrimonial Lawyers (AAML) as well as the International Academy of Family Lawyers (IAFL) and has been consistently named a Washingtonian Top Lawyer since 2015. Always emphasizing the importance of family, Marina is skilled at resolving complex custody and property division cases. Marina serves a wide range of clients, including accomplished career executives, stay-at-home spo...

Nicole M. Elliott is a top attorney recognized by Best Lawyers in the practice area(s) of Native American Law and Tax Law. Nicole M., who practices law in Washington, District of Columbia, has been recognized since 2022. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Nicole M. is held by other top lawyers in the same geographic and legal practice area.

Neil Eggleston is a litigation partner in the Washington, D.C., office of Kirkland & Ellis LLP. Neil has a distinguished record of public service, and has held a number of senior government roles. He was White House Counsel to President Obama from 2014 to 2017, and advised the president on all legal and constitutional issues across a broad spectrum of domestic and foreign policy matters. Neil’s practice focuses on enforcement defense including at the U.S. Department of Justice (DOJ)...