Jean M. Mosites

Area of Emphasis

Jean Mosites is a shareholder in the Environmental, Energy and Natural Resources, and the Public Sector groups of Babst Calland.

Her practice includes client counseling on environmental compliance in the energy sector, resolving liabilities under federal and state remediation programs, as well as administrative appeals and environmental litigation in state and federal courts.

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.


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. She 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.

Ms. Mosites was recently selected for inclusion in The Best Lawyers in America©  by BL Rankings for Environmental Law. She was selected to the 2013 and 2015-2017 Pennsylvania Rising Star lists and in 2018 was rated by Martindale-Hubbell as AV Preeminent, Peer Rated for the Highest Level of Professional Excellence.


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.