Tony Derron

Anthony B. Derron

Harry A. Bigelow Teaching Fellow, Lecturer in Law

Tony Derron is a Bigelow Teaching Fellow and Lecturer in Law. His research emphasizes the ways in which the environment influences and reflects law and society. He utilizes environmental law as a lens to interrogate the assumptions and theories underlying other fields, like property and administrative law.

Prior to joining the Law School, Tony served at the Colorado Attorney General’s Office, spearheading its multistate environmental efforts, as well as representing state agencies in litigation and rulemakings. Before that, he clerked for Chief Judge Brimmer on the U.S. District Court for the District of Colorado and Justice Hood on the Colorado Supreme Court. 

Tony holds a JD from Yale Law School and a BS in Business and Political Economy from NYU Stern School of Business.


Yale Law School, New Haven, CT

Juris Doctor, May 2018

New York University Stern School of Business, New York, NY

Bachelor of Science in Business & Political Economy, cum laude, May 2015


Colorado Attorney General’s Office, Denver, CO

Assistant Attorney General, Air Quality, November 2022 – March 2023
Natural Resources and Environment Fellow, November 2021 – November 2022

Hon. Philip A. Brimmer, Chief Judge, U.S. District Court for the District of Colorado, Denver, CO

Law Clerk, October 2019 – October 2021

Hon. William W. Hood, III, Colorado Supreme Court, Denver, CO

Law Clerk, September 2018 – September 2019

Earthjustice, Denver, CO

Law Clerk, May – August 2017

US Environmental Protection Agency, Office of Enforcement and Compliance, Washington, DC

Honors Law Clerk, May – August 2016

Sila Connection, New York, NY

Director, June 2014 – August 2015

Journal Articles

  • "Unwritten Administrative Law and the Regulatory Last Mile in Cooperative Federalism," 173 University of Pennsylvania Law Review __ (2025) (forthcoming).
  • "Trespass Plus: Ag-Gag and the Right to Exclude," 35 Georgetown Environmental Law Review 1 (2022). www

Bar Admissions

Admitted to Colorado Bar, Tenth Circuit, and the District of Colorado

Professional Memberships and Affiliations

Colorado Bar Association, Environmental Law Section, Advisory Council, 2020-2023