Candidate, United States House of Representatives, Arizona, District 6, 2022

Representative, Arizona State House of Representatives, District 10, 2017-2021

Senator, Arizona State Senate, District 10, 2021

Former Member, Arizona State Senate

Former Member, Energy, Environment and Natural Resources Committee, Arizona State House of Representatives

Former Member, Ethics Committee, Arizona State Senate

Former Member, Finance Committee, Arizona State Senate

Former Member, Judiciary and Public Safety Committee, Arizona State House of Representatives

Former Member, Judiciary Committee, Arizona State House of Representatives

Former Member, Judiciary Committee, Arizona State Senate

Former Member, Natural Resources, Energy and Water Committee, Arizona State House of Representatives

Former Member, Natural Resources, Energy and Water Committee, Arizona State Senate

Member Scholar, Center for Progressive Reform, 2009-present

Professor of Law/Environmental Law Program Co-Director, University of Arizona James E. Rogers College of Law, 2005-present

Former Visiting Associate Professor, Harvard Law

Former Visiting Associate Professor, University of California School of Law

Former Visiting Associate Professor, Vanderbilt School of Law

Associate Dean for Academic Affairs, University of Arizona James E. Rogers College of Law, 2012-2015

Senior Council, Public Protection Bureau, Massachusetts Office of Attorney General, 2001-2004

Acting Chief, Environmental Protection Division, Massachusetts Office of Attorney General, 2000-2001

Associate Professor of Law, Tulane Law School, 1992-2000

Staff Attorney, Sierra Club Legal Defense Fund, 1990-1992

Staff Attorney, United States Environmental Protection Agency, 1987-1990

Clerk, Judge Myron Bright, United States Court of Appeals for the Eighth Circuit, 1986-1987

Founding Member/Board Member, Friends of Himmel Park, 2014-present

Board Member, Tulane Environmental Law Clinic, 2001-present

Member, Planned Parenthood, present

Member, University of Arizona Renewable Energy Network, present

Member, Lineweaver Elementary Site Council Tuscon Unified School District, 2014-2015