Timothy P. O'Brien

Eric J. Rollinger is a lawyer recognized by Best Lawyers in the practice areas of Litigation and Controversy - Tax and Tax Law. Eric J. practices law in Rockville, Maryland Best Lawyers has recognized Eric J. Rollinger since 2021. 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 Eric J. Rollinger is held by other lawyers.

Daniel P. Lyon is a lawyer recognized by Best Lawyers in the practice area of Commercial Litigation. Daniel P. practices law in Leesburg, Virginia Best Lawyers has recognized Daniel P. Lyon 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 Daniel P. Lyon is held by other lawyers.

Tara L. Ward is a lawyer recognized by Best Lawyers in the practice area of Government Contracts. Tara L. practices law in Washington, District of Columbia Best Lawyers has recognized Tara L. Ward 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 Tara L. Ward is held by other lawyers.

Marcus Owens represents a broad range of nonprofit organizations, including private foundations, charities, lobbying/political organizations and trade associations. The context has ranged from tax planning, the process of formation and application for exemption, through IRS and state attorney general investigations, including complex audits by IRS Exempt Organizations Financial Investigative Units. Marcus’ focus includes executive compensation, excess benefit and self-dealing excise tax...

Dennis J. Quinn is a lawyer recognized by Best Lawyers in the practice area of Ethics and Professional Responsibility Law. Dennis J. practices law in Washington, District of Columbia Best Lawyers has recognized Dennis J. Quinn since 2021. 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 Dennis J. Quinn is held by other lawyers.

Deanne E. Maynard, chair of the Appellate and Supreme Court Practice Group, is a partner in the Washington, D.C. office, and a former Assistant to the Solicitor General at the United States Department of Justice. Ms. Maynard has argued 13 cases before the Supreme Court of the United States, and she has filed over 100 briefs in that Court. Her Supreme Court arguments include prevailing for the respondent in RadLAX Gateway Hotel, LLC v. Amalgamated Bank , an important bankruptcy case involving ...

As a Washington DC personal injury attorney, Patrick M. Regan focuses on handling some of the most complex personal injury cases, such as those involving catastrophic injuries, product liability, and medical malpractice. Called a “personal injury lawyer who could be a poster boy for legal ethics and integrity” by Washingtonian Magazine, he is board certified in Civil Trial Advocacy by the National Board of Trial Advocacy. Throughout his extensive legal career, he has recovered ver...

Andrew M. Adelman is a Senior Associate with Correia & Puth, PLLC and represents employees in all aspects of the firm’s employment litigation practice, including sex discrimination, whistleblower retaliation, and disability discrimination. Mr. Adelman’s practice is exclusively dedicated to advocating for the rights of employees, and he regularly represents employees in discrimination, retaliation, and whistleblower cases in federal and state court. Areas of Focus Mr. Adelman h...

Tom Saunders' practice focuses on appellate and government and public policy litigation with a particular emphasis on intellectual property. He has extensive experience representing clients in patent and complex civil cases and has built a reputation as a leading advocate in high-stakes appellate litigation. He has argued and won two cases, involving patents and government contracts, in the US Supreme Court, where he previously clerked for Justice Ruth Bader Ginsburg. He has also argued and w...

Gregory McGillivary is the managing partner of McGillivary Steele Elkin LLP. He has over 30 years of experience litigating, arbitrating, settling, and most importantly, winning multi-million-dollar cases on behalf of unions and individual workers who have been wrongly denied pay and benefits. He has represented tens of thousands of workers in a multitude of industries in both the public and private sector through all levels of the judiciary system and in arbitration. In addition to litigation...