Jean M. Mosites

Area of Emphasis

Jean Mosites is a shareholder in the Environmental, Energy & Natural Resources, and Public Sector Services groups of Babst Calland. Her practice focuses primarily on client counseling on environmental compliance in the energy sector, as well as resolving liabilities under federal and state remediation programs. Ms. Mosites has assisted clients responding to agency requests for information, notices of violation and orders issued under Pennsylvania’s Oil and Gas Act, Clean Streams Law, and Solid Waste Management Act, as well as federal statutes including the Clean Air Act and the Clean Water Act. She advises clients on regulatory matters encountered in the development of the Marcellus Shale, including water sourcing, handling and disposal, gas migration investigations, and site restoration obligations. She also practices before the Pennsylvania Environmental Hearing Board on a variety of matters, including appeals from compliance orders and third-party permit appeals.


Ms. Mosites graduated from the University of Pittsburgh with a B.A. in Political Science and a M.A. in International Relations. She graduated magna cum laude from Duquesne University School of Law, where she was the Executive Comment Editor for Duquesne Law Review and a top ten semifinalist in the Carol Los Mansmann Oral Argument Competition. Ms. Mosites interned with the Honorable D. Michael Fisher and the Honorable Joy Flowers Conti. Before joining Babst Calland, she practiced environmental law with a large international firm, and maintained a litigation practice, which included appellate brief submissions to the Third Circuit and to the United States Supreme Court. Ms. Mosites served on Peters Township’s Council from 1999 until 2004, representing the home-rule community at-large, serving as the vice chair and sitting on pension and grievance committees.

Memberships and Affiliations

Ms. Mosites is admitted to the Pennsylvania Bar, the U.S. District Courts for the Western District of Pennsylvania and the Northern District of Florida, and the U.S. Court of Appeals for the Third Circuit. She is a member of the Allegheny County and Pennsylvania Bar Associations. Since 2012, Ms. Mosites has been an adjunct professor of law at the Duquesne University School of Law, teaching environmental law.

Ms. Mosites has been selected to the 2013 and 2015-2017 Pennsylvania Rising Star lists.


Ms. Mosites is a regular contributor of articles to PIOGA Press, frequently presents PBI CLEs on oil and gas law, and has participated on several panel discussions at PIOGA, PGCC and Marcellus Shale Coalition events.