Matteson Ellis

Paul Oosterhuis is a senior international tax partner representing clients on a wide range of international and U.S. tax matters. Mr. Oosterhuis has extensive experience in international mergers and acquisitions, post-acquisition integration transactions, spin-offs, internal restructurings and joint venture transactions. He also represents multinational companies in nontransactional international tax planning and IRS controversy matters. In recent transactions, Mr. Oosterhuis has represented:...

The cornerstone of Jimmy’s practice is to help people by solving their problems and contributing to their growth and success. His 50 years of legal experience is complemented by an in-depth background in finance, including a number of years working for the IRS as a Revenue Agent and Tax Law Specialist, as well as several years as an investment banker at Legg Mason. With a commitment that the client’s interests always come first, Jimmy takes ownership of and responsibility for thei...

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...

Rachael Kent has more than 25 years of experience representing companies, states, state entities, and individuals in commercial and investment arbitration proceedings worldwide. She is widely recognized for her expertise in the field and for her exceptional written and oral advocacy skills. She has been the lead advocate in numerous complex arbitrations in the energy, mining, aerospace, defense, pharmaceutical, construction, insurance, telecommunications, technology and retail sectors, among ...

Joel Swearingen is an associate in the firm’s Project Finance and Public Finance practice group, representing issuers, underwriters, and borrowers on a variety of public finance transactions. He also has substantial experience in the field of tax withholding and information reporting, both internationally and domestically. What do you focus on? My practice includes representing clients on tax matters present in connection with public finance transactions. I also advise clients on the in...

Paul Smollar has been practicing family law for more than forty years, and has become a leader in Collaborative Practice in the Washington Metropolitan Area. Recognized as the only trained mediator in the District of Columbia by the American Academy of Matrimonial Lawyers, Mr. Smollar nevertheless is an accomplished litigator when matters do not settle. Mr. Smollar practices in both the District of Columbia and Virginia and is an active member of the Fairfax County Bar, the Virginia Trial Law...

Henry Asbill is a lawyer recognized by Best Lawyers in the practice areas of Commercial Litigation, Criminal Defense: General Practice and Criminal Defense: White-Collar. Henry practices law in Washington, District of Columbia Best Lawyers has recognized Henry Asbill since 2009. 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 Henry Asbill is held by other l...

Joshua B. Waxman is a lawyer recognized by Best Lawyers in the practice area of Litigation - Labor and Employment. Joshua B. practices law in Washington, District of Columbia Best Lawyers has recognized Joshua B. Waxman 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 Joshua B. Waxman is held by other lawyers.

Scott Sergio is a lawyer recognized by Best Lawyers in the practice area of Real Estate Law. Scott practices law in Washington, District of Columbia Best Lawyers has recognized Scott Sergio since 2026. 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 Scott Sergio is held by other lawyers.

Brian Murray is a founding partner of Murray Osorio PLLC in Fairfax, Virginia, where he focuses on Immigration Law . He represents individuals and families in immigration proceedings, with an emphasis on complex waiver matters, inadmissibility and removability issues, and the immigration consequences of criminal convictions, often referred to as “crimmigration.” Brian regularly works with criminal defense counsel in Virginia, Washington, D.C., and across the United States to help ...