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  • John McAleese is praised by his clients for his scientific background, having previously worked as a chemical engineer. One commentator notes: "He is very intelligent, articulate and calm." - Chambers USA


  • J.D., New York University School of Law, 1989
  • B.Ch. E., Villanova University, 1984

Bar Admissions

  • Pennsylvania

Memberships & Affiliations

American Bar Association

Pennsylvania Bar Association

Philadelphia Bar Association

Tau Beta Pi (National Engineering Honor Society)

John J. McAleese

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  • T: 215.979.3892
    F: 215.599.7333

John J. McAleese, III is a partner in the Environment & Energy Practice Group.  Mr. McAleese’s practice is concentrated on environmental and energy matters.  His background includes:

  • Representing corporate clients in civil and administrative environmental litigation such as cost recovery actions under CERCLA (Superfund) and analogous state statutes, enforcement actions by federal and state environmental agencies, permit appeals and toxic torts relating to environmental contamination.
  • Advising clients on environmental issues that arise in business transactions involving real estate.
  • Counseling clients on compliance with federal, state and local environmental laws and regulations.
  • Representing clients in negotiations with environmental regulatory agencies such as the U.S. Environmental Protection Agency.
  • Counseling clients on issues regarding insurance coverage for environmental risks.

Mr. McAleese has been recognized as a Chambers USA "Leaders in their Field" lawyer for 2009-2014. According to Chambers, John McAleese is praised by his clients for his scientific background, having previously worked as a chemical engineer. One commentator notes: "He is very intelligent, articulate and calm." He has also been recognized as a Pennsylvania Super Lawyer for 2008-2013 and is also listed in the 2004, 2006-2012, 2014 and 2015 editions of The Best Lawyers in America.

Prior to attending law school, Mr. McAleese was a practicing chemical engineer, focusing on process control.

Representative Matters

Defense of Class and Mass Actions
Represented clients in defense of class and mass actions for property damage and medical monitoring associated with alleged groundwater contamination.  Negotiated favorable settlements in class action and mass tort actions.
International Specialty Chemical Manufacturer
Represented an international specialty chemical manufacturer in an enforcement action brought by the State of New Hampshire alleging various violations of the State’s hazardous waste management laws and regulations.  After a three-day trial, the court completely dismissed the State’s claims.
International Manufacturer
Representing international manufacturer in connection with a New Jersey National Priorities List Superfund Site involving contaminated groundwater.
International Aerospace Company
Represented international aerospace company in contractual indemnification claim against brownfield developer.  Negotiated settlement whereby client obtained funds to complete remediation of contaminated property.
International Tool Manufacturer
Advised a leading international tool manufacturer on environmental issues associated with acquisition of a drill bit manufacturing company.
Boxboard Manufacturer
Represented a leading boxboard manufacturer in a lawsuit brought by a Philadelphia-area township seeking an injunction against the client to cease and desist from making excessive noise and releasing soot from client’s boxboard manufacturing facility.  The township alleged that the client emitted noises above the township’s standards and that two separate and distinct sooting events by the client required an injunction.  Negotiated a favorable settlement with the township.
Petroleum Refiner and Marketer
Counseled a leading petroleum refiner and marketer in acquisition of a petroleum refinery in the State of New Jersey.


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