Area of Emphasis
Jean Mosites is of counsel in the Environmental, Energy and Natural Resources, and the Public
Sector groups of Babst Calland. She is past co-chair of the
Environmental Group. 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 represents clients in the Pennsylvania Commonwealth Court’s
original jurisdiction, challenging agency action that departs from the
requirements of Pennsylvania’s Regulatory Review Act and Administrative Law and
Procedure.
Ms. Mosites has assisted
clients responding to agency requests for information, notices of violation and
orders issued under state and federal laws, including Pennsylvania’s Oil and
Gas Act, Clean Streams Law, and Solid Waste Management Act, as well as the Clean
Air Act and the Clean Water Act. She regularly advises clients on regulatory
matters encountered in the development of the oil and gas resources, including UIC
well permitting, gas storage, water sourcing, handling and disposal, gas
migration investigations, and site restoration obligations. Her federal
practice includes allocation proceedings under and compliance with the Comprehensive
Environmental Response, Compensation and Liability Act at a number of sites
nationwide. Ms. Mosites actively participates in the Firm’s PFAS Working Group, which provides legal services to clients across business sectors regarding the evolving regulatory, legislative, litigation and transactional landscapes related to PFAS.
Background
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 Court for the Western District of
Pennsylvania and the U.S. Court of Appeals for the Third Circuit. She is a
member of the Allegheny County and Pennsylvania Bar associations. She served on
the Pennsylvania Bar Association’s Environmental and Energy Law Section Council
from 2015 until 2022. In March 2020, Pennsylvania House Speaker Michael Turzai
appointed Ms. Mosites to the Pennsylvania Environmental Hearing Board Rules Committee.
Since 2018, Ms. Mosites has been rated by Martindale-Hubbell as AV Preeminent, Peer Rated for the Highest Level of Professional Excellence. She has been recognized in The Best Lawyers in America® for Environmental Law since 2019 and Energy Law since 2025 and was named the Best Lawyers® 2026 Environmental Law “Lawyer of the Year” in Pittsburgh, Pa. Ms. Mosites was selected to the 2013 and 2015-2017 Pennsylvania Rising Stars lists (Thomson Reuters).
Publications/Presentations
Ms. Mosites is a regular
contributor of articles to PIOGA Press, frequently plans and presents
Pennsylvania Bar Institute CLE programs on oil and gas law, and has participated
on numerous panel discussions and training seminars for the Pennsylvania
Independent Oil & Gas Association, Pennsylvania Grade Crude Oil Coalition,
and the Marcellus Shale Coalition.
