David M. Knasel

Jonathan G. Hardin is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Insurance. Jonathan G., 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 Jonathan G. is held by other top lawyers in the same geographic and legal practice area.

Alan Winston Granwell is a top attorney recognized by Best Lawyers in the practice area(s) of Tax Law. Alan Winston, who practices law in Washington, District of Columbia, has been recognized since 2006. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Alan Winston is held by other top lawyers in the same geographic and legal practice area.

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 ...

Joseph Guarino handles dispute resolution in the construction sector, including major claims relating to the development of energy facilities, hotel complexes and commercial buildings. His experience includes all aspects of contract drafting and negotiations, counseling on contract administration, claim preservation and avoidance, and dispute resolution and litigation within the construction industry. Joe's broad experience includes tunnels, power plants, high-rise buildings, hospitals, deten...

Ken Weigel, a partner in the firm’s International Trade & Regulatory Group, has over 30 years of experience in advising companies on all aspects of international trade regulatory issues. His substantive areas of practice encompass export controls and sanctions, customs, trade remedy proceedings (e.g., antidumping), trade policy and related areas. In these areas, he represents companies before the agencies and the courts in audits, civil and criminal investigations and disclosures; h...

Marna S. Tucker has practiced law in the domestic relations field for almost forty years, and is a nationwide expert in complex divorces, domestic violence and prenuptial matters. She has been recognized several times as one of the "Top Divorce Lawyers" by the Washingtonian Magazine as well as one of the "Top Lawyers" in Washington, D.C. She was noted as one of the top divorce lawyers in the nation by Town and Country magazine. She is a Fellow of the prestigious American College of Trial Lawy...

Jay E. Silberg is a top attorney recognized by Best Lawyers in the practice area(s) of Energy Law. Jay E., who practices law in Washington, District of Columbia, has been recognized since 2010. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Jay E. is held by other top lawyers in the same geographic and legal practice area.

For more information, please visit www.gibsondunn.com/lawyer/harrison-Donald/ .

Paul E. Alpuche, Jr. is a top attorney recognized by Best Lawyers in the practice area(s) of Business Organizations (including LLCs and Partnerships), Closely Held Companies and Family Businesses Law and Tax Law. Paul E., who practices law in Bethesda, Maryland, has been recognized since 2018. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Paul E. is held by other top lawyers in the same geographic and legal practice area.

With a background representing emerging and established business entities, David Shapiro excels in providing end-to-end legal support to clients looking to navigate the complex legal landscape of running a successful business. From drafting and negotiating business contracts to regulatory and complex transactional matters, he provides his clients with a full range of legal services. Mr. Shapiro specializes in several areas of business law, including Corporate and Business Law and Transactions...