Paul Libus represents vehicle and engine manufacturers on a variety of environmental issues before federal and state agencies, with particular emphasis on the Clean Air Act (CAA).  With regard to the CAA, his focus includes compliance with emissions and on-board diagnostics (OBD) regulations, the allocation of state and federal regulatory authority, investigating compliance issues, and assisting clients in enforcement proceedings before the U.S. Environmental Protections Agency (EPA) and the California Air Resources Board (CARB).

During his final year at the George Washington University Law School, Paul clerked for the Vehicle and Engine Enforcement Branch of the EPA’s Office of Enforcement and Compliance Assurance, where he worked on enforcement actions involving aftermarket defeat devices, proceedings before the Environmental Appeals Board, and self-disclosure matters.

  • Experience
    • Experience with various Clean Air Act mobile source issues, including aftermarket tampering and defeat devices, imports, and federal preemption.
    • Drafted litigation-related documents, including: sections of administrative appellate briefs, DOJ case referrals and waiver requests, consent agreements, and pleadings in judicial and administrative proceedings.
    • Conducted legal research and wrote memoranda on state and federal enforcement-related issues in Title II of the Clean Air Act.
    • Researched and briefed management on state tampering and defeat device prohibitions to identify potential enforcement partners.
    • Created a training program and reference compendium for government attorneys on enforcing Clean Air Act § 203(a)(3) in the aftermarket context.
    • Implemented a database to track aftermarket tampering and defeat device enforcement actions at EPA HQ, EPA regional offices, and the DOJ.
  • Professional Affiliations
  • Awards & Honors
  • Bar & Court Admissions
    California State Bar
  • Government Service

    Environmental Protection Agency, Vehicle and Engine Enforcement Branch

    Honors Law Clerk, 2018

    U. S. House of Representatives, Office of Earl Pomeroy

    Legislative Fellow, 2010

    U.S. House of Representatives, Office of  Dan Lipinski

    Legislative Intern, 2010

    U. S. House of Representatives, Office of Phil Hare

    Legislative Intern, 2010

    United States Senate, Office of  Barbara Boxer

    Legislative Intern, 2009

  • News & Presentations
  • Thought Leadership
* Not admitted to practice in the District of Columbia. Work is supervised by a member of the District of Columbia bar.


George Washington University School of Law J.D., 2018

University of California, Irvine B.A., 2009