Kirk A. Sigmon

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:...

Caroline H. Cheng is a principal in the Washington, D.C. Region office of Jackson Lewis P.C. Her practice focuses on providing preventive advice and counsel, as well as representing employers in workplace law matters. In her counseling practice, Caroline strives to provide practical business advice based on best practices. She regularly advises clients on a broad range of matters arising under federal, state, and local laws, including policy design and drafting, employment contracts, restrict...

Jack S. Barufka is a lawyer recognized by Best Lawyers in the practice area of Patent Law. Jack S. practices law in Tysons, Virginia Best Lawyers has recognized Jack S. Barufka 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 Jack S. Barufka is held by other lawyers.

" Top 10 " Lawyer in DC Metro Area (out of 80,000 attorneys) - Education: Juris Doctorate (JD), George Washington University Law School, 1992--President, Moot Court Board, Nominated Laws School's Best Negotiator. Bachelor of Arts (Philosophy Major), The College of William and Mary--1989 NCAA Academic All-American for outstanding achievement in athletics and academics, Division I College Wrestler, Virginia State Championship Wrestling Team

For more than 15 years, Leigh has been helping families and individuals navigate matters that include divorce, custody, visitation, spousal support, child support, property division and protective orders. She represents clients throughout Northern Virginia in all aspects of domestic relations litigation. While litigation is a fundamental aspect of her practice, the majority of her cases settle outside of court. It is Leigh’s goal to help clients reach an agreement in the most efficient ...

Matthew J. Malinowski is a lawyer recognized by Best Lawyers in the practice area of Mass Tort Litigation / Class Actions - Defendants. Matthew J. practices law in Washington, District of Columbia Best Lawyers has recognized Matthew J. Malinowski since 2024. 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 Matthew J. Malinowski is held by other lawyers.

Area of Emphasis Jim Curry is the Managing Shareholder of the Firm’s Washington, D.C. office. Jim is an energy lawyer with years of experience in government service and private practice helping clients navigate difficult regulatory and strategic challenges throughout the energy sector. His clients include pipelines, utilities, energy producers, LNG terminals, investors, technology companies, chemical makers, and hydrogen infrastructure developers. Jim takes a pragmatic, business-minded ...

Diara M. Holmes serves as co-chair of the firm's Tax-Exempt Organizations Practice. She counsels tax-exempt organizations, including large public charities; colleges, universities and other higher education organizations; foreign charities and their U.S. affiliates; associations; government instrumentalities; social welfare organizations; and religious organizations on a broad range of tax compliance and governance issues. She advises nonprofit and for-profit organizations on structuring a va...

Andrew Thomas started his career representing insurance companies throughout Northern Virginia. Now, he only represents people and families against insurance companies. He's an accomplished trial lawyer specializing in serious auto collision, trucking collision, and other personal injury cases. He's handled thousands of cases within both state and federal court systems, and has obtained numerous multi-million dollar recoveries for his clients. Andrew is known for taking a diligent, aggressive...

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...