Jill Weller has more than 30 years of experience counseling clients on a wide variety of issues under federal and state environmental law. She is a trusted advisor who regularly provides practical solutions to environmental issues raised in the context of corporate and real estate transactions. 

She has extensive experience counseling and defending clients on matters such as voluntary and "Brownfields" cleanups; CERCLA administrative and cost recovery actions; compliance counseling for hazardous waste, wastewater discharge and other environmental regulations; defense of environmental enforcement actions and citizen suits; administrative and judicial review of permits and other agency actions.

From 1981 to 1985, Jill was an attorney with the U.S. Environmental Protection Agency, Office of General Counsel, in Washington D.C. Prior to joining Keating Muething & Klekamp, Jill was a partner at Thompson Hine in Cincinnati, Ohio. 

Jill was recognized in the 2020 edition of The Best Lawyers in America© as "Cincinnati Best Lawyers' Environmental Law Lawyer of the Year", a designation that is presented annually to a single attorney in each practice area and metropolitan area. 

Representative Work

Representation of "potentially responsible parties" in federal and state superfund actions

Federal Clean Water Act Section 401 certifications and Section 404 permits

Defense of federal Clean Water Act citizen suit 

CERCLA cost recovery litigation against recalcitrant site owners and other responsible parties

Due diligence (Phase I and Phase II), contract drafting and negotiations with respect to environmental issues in corporate and real estate transactions

Ohio Voluntary Action Program site redevelopment

RCRA hazardous waste facility closures and corrective action

Closure and "no further action" status for industrial facilities

Defense of civil, criminal and administrative enforcement proceedings

Oversight and strategy for post-closing environmental cleanups

Title V and other air permitting issues

Represented government, trade associations and companies in review of major federal actions in U.S. Courts of Appeal

Environmental audits and development of environmental compliance strategies

Coordination of due diligence for overseas facilities (Mexico, China, Spain, etc.)

Wastewater and other permits for new facilities

Defense of Nuclear Regulatory Commission enforcement action for radioactive devices used in manufacturing

Foundry, Automotive, Steel Service Centers, Plumbing Fixture Manufacturing, Large Appliance Manufacturing, Stamping, Culvert Manufacturing, Pulp and Paper, Waste Management

Professional and Community Involvement

Cincinnati Bar Association

District of Columbia Bar Association

Cincinnati Opera, Board of Trustees, 1996-2000

Georgetown University, Chairman Alumni Admissions Program Committee

Ohio State Bar Association

Awards & Recognition

Listed in The Best Lawyers in America, 2016-2021

Named the "Cincinnati Best Lawyers' Environmental Law Lawyer of the Year", 2020

Named to Ohio Super Lawyers, 2009-2014

AV® Preeminent™ Peer Review Rated, Martindale-Hubbell

  • Best Lawyers (Don't Delete)
  • Best Lawyers - JAW 2020
  • Peer Review (Don't Delete)

News & Resources



  • Ohio
  • District of Columbia


J.D., Catholic University of America, Columbus School of Law, 1981

A.B., Georgetown University, 1978

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