Cynthia M. Radomsky

Matt Oppenheim is the managing partner of Oppenheim + Zebrak, LLP. Matt is a nationally recognized litigator who represents clients in a wide range of matters involving content, brands and related commercial and strategic issues. Billboard magazine has named Matt multiple times to its distinguished “Top Music Lawyers” list, which honors lawyers on the front lines of the music industry's legal battles and deals. In addition, the prestigious, independent legal rankings agency Chambe...

As a former trial attorney for the DOJ, Dan knows the complexities of federal court litigation with federal agencies. He litigates cases for companies facing adverse regulatory initiatives or enforcement actions by agencies like the FDA. Dan Jarcho represents clients in federal trial court and appellate litigation involving federal regulatory issues. Dan has litigated numerous Administrative Procedure Act challenges to federal agency actions, including cases involving the U.S. Food and Drug A...

Jennifer Locke is a lawyer recognized by Best Lawyers in the practice area of Trusts and Estates. Jennifer practices law in Washington, District of Columbia Best Lawyers has recognized Jennifer Locke since 2022. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Jennifer Locke is held by other lawyers.

David G. Tewksbury focuses his practice on federal energy regulatory law, particularly as it relates to electric power. He advises independent power producers, power marketers, trade associations and others on a wide range of federal energy regulatory, markets and reliability matters. Read full biography: https://www.mwe.com/people/tewksbury-david-g/

Adam Herzog, a partner of Katz Banks Kumin, joined the Firm in December 2013. Mr. Herzog has represented numerous clients pursuing whistleblower tips before the SEC, CFTC and FINCEN and has successfully assisted them in earning millions of dollars in award payments. Three of Mr. Herzog’s clients received SEC whistleblower awards in the second half of 2023 alone, some of whom participated in a $104 million total award that was the fourth largest in the SEC program’s history. Detail...

John's practice focuses on the representation of mutual funds, exchange-traded funds (ETFs), closed-end funds and business development companies (BDCs) and their independent board members. He advises clients on a range of matters, including the formation, operation, merger and liquidation of mutual funds, closed-end funds, ETFs, and BDCs. John has extensive experience working on transactions involving registered funds, such as adviser acquisitions, fund adoptions and product launches.

Mark is a seasoned white-collar attorney who has led trial teams on several cases of national acclaim. For more than five years, he was the Chief of the Financial Crimes and Public Corruption Unit at the U.S. Attorney’s Office for the Eastern District of Virginia, where he supervised more than 15 federal prosecutors whose investigations and trials covered just about every white-collar matter possible, including: fraud, corruption, Foreign Corrupt Practices Act (FCPA), Racketeer Influenc...

Mark E. Shaffer is a lawyer recognized by Best Lawyers in the practice areas of Commercial Litigation and Litigation - Real Estate. Mark E. practices law in McLean, Virginia Best Lawyers has recognized Mark E. Shaffer since 2025. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Mark E. Shaffer is held by other lawyers.

Jay R. Nanavati is an accomplished litigator, a former federal tax prosecutor, and a founding partner of Kostelanetz LLP's Washington, D.C., office. He has developed an enviable record of success in persuading the government to terminate investigations of his clients and in defeating the government in court. Mr. Nanavati maintains a nationwide practice, focusing on white-collar criminal defense with an emphasis on tax-related matters. He represents individuals and entities facing investigatio...

Larry Gage is a senior counsel in the firm’s Washington, D.C. office whose practice is focused primarily on public sector and nonprofit health law and policy. In 1981, Larry founded the National Association of Public Hospitals and Health Systems (NAPH)(an organization now known as America’s Essential Hospitals). He served as president of that organization for over 30 years, developing and achieving enactment of Medicare and Medicaid reimbursement reforms that are the economic life...