Daniel Rottenberg is a member of Mayer Brown’s Environmental group. He represents business, association and individual clients in complex environmental, toxic tort and administrative law matters. 

Daniel served with the Illinois Attorney General’s Environmental Bureau from 2017-2021 before entering private practice. While at the Attorney General’s Office, Daniel litigated environmental enforcement matters in state and federal court. He also coordinated involvement of the Attorney General and State of Illinois in federal legislative and multi-state litigation matters. In 2019, Daniel successfully briefed and argued a complex Clean Air Act case in the US Court of Appeals for the DC Circuit.

Prior to joining the Attorney General’s Office, Daniel served as a judicial law clerk for the Honorable Lynn M. Egan. He also served as a Climate Litigation Fellow at the Natural Resources Defense Council. In law school, Daniel served as a summer law clerk in the US Environmental Protection Agency’s Office of General Counsel Air and Radiation Law Office, where he gained experience working on a number of high-profile rulemakings.

Spoken Languages

  • English
  • Spanish
Environmental Group of the Year


Lewis and Clark Law School, JD, magna cum laude
Submissions Editor, Environmental Law; Member, Cornelius Honor Society; Semifinalist, National Environmental Moot Court Competition, 2014 and 2015

University of Oregon, BA, with department honors
Dean’s Award for Service


  • Illinois


  • US Court of Appeals for the District of Columbia Circuit
  • US Court of Appeals for the Ninth Circuit
  • US District Court for the Northern District of Illinois