Zachary M. Vaughan

Bob Wellen, a partner of the firm, has practiced tax law for nearly 35 years. His practice involves planning, structuring and negotiating business transactions and representing taxpayers seeking private letter rulings from IRS and tax policy determinations from IRS and the Treasury Department and in controversies with IRS. He also serves as an arbitrator and as an expert witness in commercial disputes involving tax issues. Bob grew up in Jersey City, New Jersey. He graduated from Yale College...

Brian D. Israel is a top attorney recognized by Best Lawyers in the practice area(s) of Environmental Law and Litigation - Environmental. Brian D., who practices law in Washington, District of Columbia, has been recognized since 2020. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Brian D. is held by other top lawyers in the same geographic and legal practice area.

Elizabeth Quinn is a recognized authority on business immigration matters and the unique problems of J-1 exchange visitors. Among her clients are hospitality and biotechnology companies, artists and musicians, and those working in the human rights field. She also handles family-based immigration matters, naturalization, and waivers of inadmissibility. Elizabeth has written and lectured on a wide-range of immigration issues, including the various visa options for international medical graduate...

Shay Dvoretzky is a top attorney recognized by Best Lawyers in the practice area(s) of Appellate Practice. Shay, who practices law in Washington, District of Columbia, has been recognized since 2020. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Shay is held by other top lawyers in the same geographic and legal practice area.

Ciara R.M. Baker is a top attorney recognized by Best Lawyers in the practice area(s) of Tax Law. Ciara R.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 Ciara R.M. is held by other top lawyers in the same geographic and legal practice area.

Danielle Morris is a top attorney recognized by Best Lawyers in the practice area(s) of International Arbitration - Commercial and International Arbitration - Governmental. Danielle, who practices law in Washington, District of Columbia, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Danielle is held by other top lawyers in the same geographic and legal practice area.

Clients depend on Mike's congressional and administration experience, serving as health policy counsel to the Senate Committee on Finance and in several roles in the Department of Health and Human Services, for representation on both legislative and regulatory matters. His direct work with policymakers enables him to meet the legislative and regulatory needs of his clients. Michael served as health policy counsel to Senator Charles Grassley (R-IA), Chairman of the Senate Committee on Finance,...

With more than 23 years of experience working with the pharmaceutical and medical device industries, Ms. Walsh brings FDA regulatory expertise to clients seeking to achieve their business objectives. She regularly counsels clients facing FDA administrative actions like inspections, warning letters, and recalls. But her passion is helping companies prevent or respond to government investigations, and she conducts internal investigations to achieve compliance and to best position her clients to...

Cathy Burgess leads the firm’s FDA Compliance and Enforcement Team and FDA practice. FDA-regulated entities benefit from Cathy's common-sense advice for achieving business objectives that avoid compliance and enforcement risks. With more than 30 years of extensive experience in the areas of CGMP regulation and product risk management, she provides strategic counseling and works with clients to identify and address potential risks throughout the product life cycle. Cathy advises clients ...

John E. Kelly is a top attorney recognized by Best Lawyers in the practice area(s) of Criminal Defense: White-Collar and Health Care Law. John E., who practices law in Washington, District of Columbia, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which John E. is held by other top lawyers in the same geographic and legal practice area.