Antonio J. Rivera

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

Jonathan G. Hardin is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Insurance. Jonathan G., 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 Jonathan G. is held by other top lawyers in the same geographic and legal practice area.

Adam W. Walsh is a partner of Grossberg, Yochelson, Fox & Beyda, LLP. He received a Bachelor of Arts degree from the University of Notre Dame and a Juris Doctor degree from the College of William and Mary School of Law. Mr. Walsh has 20 years of experience working with both institutional and entrepreneurial clients in the acquisition, development, structuring, leasing and financing of commercial real estate projects. The complex transactions that Mr. Walsh handles include joint venture fo...

Kenneth M. Minesinger represents a wide range of clients in the natural gas, oil and electricity industries on regulatory issues, including energy regulatory proceedings before the Federal Energy Regulatory Commission (FERC), state regulatory commissions, and on related antitrust, litigation and transactional matters. Ken also spends a significant amount of time representing sovereigns in the development of their oil and gas resources. Ken has represented clients in commercial negotiations; c...

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...

Michael J. Goecke is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation, Litigation - Real Estate and Litigation - Trusts and Estates. Michael J., 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 Michael J. is held by other top lawyers in the same geographic and legal practice area.

Tom Hyatt is a Partner in the law firm of SNR Denton US LLP, resident in the Washington, DC office. Tom chairs the Firm's health care practice. He is a 1979 cum laude graduate of Boston College, and received his law degree in 1982 from the University of Pittsburgh, where he served as Editor-in-Chief of the Journal of Law and Commerce. His practice is focused on corporate and tax-exempt organization issues for nonprofit organizations. He has particular expertise in legal issues affecting tax-e...

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

Former two-term Democratic U.S. senator and Arkansas attorney general. Guides clients through sensitive state AG matters and congressional investigations. D.C.’s go-to lobbyist to get things done ethically, efficiently and effectively. Mark Pryor earned a reputation on Capitol Hill as a "voice of reason” during his 12 years representing Arkansas in the Senate and worked across the aisle to pass more than 70 pieces of legislation on a range of critical issues, from consumer protect...

John A.C. Keith is a top attorney recognized by Best Lawyers in the practice area(s) of Bet-the-Company Litigation, Commercial Litigation, Legal Malpractice Law - Defendants, Litigation - Trusts and Estates and Trusts and Estates. John A.C., who practices law in Fairfax, Virginia, has been recognized since 2006. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which John A.C. is held by other top lawyers in the same geographic and legal practice area.