Ronald Jay Tenpas

District of Columbia

District of Columbia Bar

Maryland

Maryland Court of Appeals

Since 2000

Partner — Environmental & Natural Resources

Vinson & Elkins LLP

Current

Assistant Attorney General

U.S. Department of Justice, Environment and Natural Resources Division, Environmental Enforcement Section

2007 - 2009

Associate Deputy Attorney General

U.S. Department of Justice, Environment and Natural Resources Division, Environmental Enforcement Section

2005 - 2007

United States Attorney

U.S. Attorney’s Office for the Southern District of Illinois

2003 - 2005

Assistant United States Attorney

U.S. Attorney’s Office for the District of Maryland

1999 - 2003

Assistant United States Attorney

U.S. Attorney’s Office for the Middle District of Florida

1997 - 1999

Judicial clerk to The Honorable Howard Holtzmann

Iran-United States Claims Tribunal – The Hague, Netherlands

1992 - 1993

Judicial clerk to The Honorable William H. Rehnquist, Chief Justice

U.S. Supreme Court

1991 - 1992

Judicial clerk to The Honorable Judge Louis H. Pollak

U.S. District Court for the Eastern District of Pennsylvania

1990 - 1991

University of Virginia School of Law

J.D. (1990)

University of Oxford, Balliol College

B.A. (1987)

Michigan State University

B.A. (1985)

Honors: with high honors

Selected to the Washington, D.C. Super Lawyers list

Super Lawyers

2020

Who’s Who Legal

Who’s Who

2016

Who’s Who Legal (Law Business Research Ltd.), Environment

Edmund J. Randolph Award for Outstanding Service

U.S. Department of Justice

2009

The Best Lawyers in America, Litigation – Environmental

Best Lawyers

2017–2021

Legal 500 U.S.

Legal 500

Legal 500 U.S., Environment: Litigation, 2014, 2016, 2019; Corporate Investigations and White-Collar Criminal Defense, 2019; Environment: Regulatory, 2019

American Bar Association

Council Member

Current

American Association of Rhodes Scholars

Member

Current

District of Columbia Bar

Member

Current

Maryland State Bar

Member

2000 - Current