November 28, 2021

Volume XI, Number 332


George P. Sibley, III

Trey’s practice focuses on environmental litigation and trial work.

Trey has been trial counsel in a diverse array of trials and appeals, including major CERCLA cost-recovery actions, defense of environmental citizen suits and civil enforcement cases, consumer class actions and federal civil rights. Trey combines courtroom experience in complex trials with the substantive knowledge specific to environmental disputes arising under the federal Clean Air Act, Clean Water Act, National Environmental Policy Act and Endangered Species Act.

Trey was law clerk to the Hon. Karen J. Williams of the US Court of Appeals for the Fourth Circuit from 2003-2004. He also clerked for the Hon. Robert E. Payne of the US District Court, Eastern District of Virginia, from 2002-2003. Before attending law school, Trey served as a Surface Warfare Officer in the United States Navy.

Relevant Experience

  • Appellate counsel for natural gas pipeline company in challenges brought under the Clean Water Act and National Environmental Policy Act to permits necessary for the construction of a major interstate natural gas pipeline.  (11th Cir. 2016)

  • Trial counsel for major phosphate producer in citizen suit challenging federal agencies’ compliance with Clean Water Act, Endangered Species Act, and National Environmental Policy Act in issuing permits under section 404 of the Clean Water Act.  (M.D. Fla. 2016–present)

  • Trial counsel for major forest products company in CERCLA cost-recovery action. (W.D. Mich. 2011–present)

  • Represented major coal producer in challenge to EPA’s attempt to retroactively veto a Clean Water Action Section 404 permit. (D.C. Cir. and D.D.C. 2010–present)

  • Briefed and argued issue of first impression in the Third Circuit involving the interstate transport of air pollution. (3d Cir. 2012-2013)

  • Represented major coal producer in putative class action involving claims of private and public nuisance associated with the operation of a coal ash disposal facility; secured complete dismissal of claims (E.D. Okla. 2012-2015)


Articles in the National Law Review database by George P. Sibley, III