David Lehn


Lehn, David

David Lehn’s practice focuses on government and regulatory litigation, typically at the appellate and Supreme Court stages, as well as on administrative rulemakings. He has represented clients in matters involving, for example, antitrust law, campaign finance regulation, banking regulation, equal protection and due process, government takings, and government contracts.

Mr. Lehn joined the firm in 2014 after serving as an attorney-adviser in the Office of Legal Counsel at the US Department of Justice. During his time there, Mr. Lehn provided legal advice to the White House and executive agencies on a diverse range of legal issues, including cybersecurity, executive privilege and congressional investigations, and the First Amendment.

Before joining OLC, Mr. Lehn was an associate at Cooper & Kirk PLLC in Washington DC, where his practice focused on appellate and Supreme Court litigation.

Publications & News


March 17, 2016

Energy Sector Alert Series: Appellate Courts Hearing More Energy Cases

Over the last several years, a number of important energy-related cases have reached the US Supreme Court or the federal courts of appeals. Many of these cases concern the scope of authority of the Federal Energy Regulatory Commission and the Environment Protection Agency to regulate in this area.

March 10, 2016

For WilmerHale, a High Court 'No' Means a Client 'Yes'

WilmerHale achieved a victory for San Jose when the US Supreme Court denied cert. in California Building Industry Association v. San Jose, a case in which the firm represented the City of San Jose, California.


Skip Navigation Links.


JD, magna cum laude, New York University School of Law, 2004, Law Review Alumni Association Award, Frank H. Sommer Memorial Award

AB, Philosophy, cum laude, Harvard University, 1999, John Harvard Award

Bar Admissions

District of Columbia

New York


The Hon. Douglas H. Ginsburg, US Court of Appeals for the District of Columbia Circuit, 2007 - 2008

Skip Navigation Links.