Donald B. Reynolds, Jr.

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

John Partigan is known for his extensive experience in public and private company mergers and acquisitions, joint ventures and strategic alliances, capital markets transactions, and corporate governance. He is the team leader of the firm’s national Securities practice. My focus My focus is on helping our clients achieve their goals, by efficiently and effectively structuring and executing on transformative transactions, including acquisitions, dispositions, debt or equity financings, in...

Catherine Guttman-McCabe is a top attorney recognized by Best Lawyers in the practice area(s) of Civil Rights Law. Catherine, who practices law in Washington, District of Columbia, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Catherine is held by other top lawyers in the same geographic and legal practice area.

Thomas (Tom) Berger’s practice is based on an in-depth understanding of and experience with the chemicals, plastics, and electronics industries. As a preeminent practitioner with over 30 years of experience, Tom helps clients commercialize new chemical products and preserve supply chains for existing chemical products utilizing an interdisciplinary team approach combining law and science, with an emphasis on emerging technologies in the industrial and consumer chemicals areas. Tom&rsquo...

Lars Golumbic serves as the co-chair of the firm’s Litigation Practice. His ERISA litigation practice includes the defense of “excessive fee” and ESOP class actions brought against plan sponsors, fiduciaries, and service providers. Lars also represents health plan sponsors and health insurers in actions brought under the Mental Health Parity and Addiction Equity Act. Additionally, Lars defends plan trustees, fiduciaries, companies and their board members, and service provide...

Gary B. Mims has practiced law since 1980. He was a defense litigator for 20 years, defending a heavy schedule of trials involving automobile, trucking, train and other transportation accidents and a wide variety of personal injury cases. He developed a special interest and significant experience in medical malpractice, first from the defense side, and since 1999, as a plaintiff's attorney. He has successfully represented clients in complicated medical cases involving, among other things, fai...

Barry J. Hurewitz is a partner in the firm's Regulatory and Government Affairs and Transactional Departments, and a member of the Defense, National Security and Government Contracts and Cybersecurity, Privacy and Communications Groups. He is also a member of the firm's FinTech Group. He joined the firm in 1994.

Louis Mazawey brings decades of experience as an authority on the tax aspects of employee benefits in all forms to his work at Groom. As counsel to major insurance companies and a variety of plan sponsors—including corporate employers, trade associations, and public retirement systems—Lou has worked closely with qualified plans, 403(b) and 457 plans, IRAs, employee stock ownership plans, executive compensation, retiree medical benefits, plan terminations, mergers and spinoffs, the...

Jeffrey A. D. Cohen is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate Law. Jeffrey A. D., who practices law in McLean, Virginia, has been recognized since 2015. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Jeffrey A. D. is held by other top lawyers in the same geographic and legal practice area.

Aaron M. Oser is a top attorney recognized by Best Lawyers in the practice area(s) of Technology Law. Aaron M., who practices law in Washington, District of Columbia, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Aaron M. is held by other top lawyers in the same geographic and legal practice area.