Errin represents organizations, property developers, and businesses in environmental and occupational safety and health regulatory compliance. He advises clients on state and federal environmental regulations and handles permitting, audits, dispute resolution, and environmental litigation.
He helps clients navigate environmental laws, develop compliance strategies, assist with permitting, conduct audits and investigations, and represent clients in enforcement actions and litigation. Errin also assists real estate developers and construction contractors with environmental permitting and regulatory requirements throughout the various stages of development projects. He supports the environmental legal aspects of mergers and acquisitions, assisting buyers and sellers with environmental due diligence, risk assessments, negotiation of environmental provisions in deal terms, and post-closing considerations.
Errin regularly advises clients on compliance with federal and state regulatory and permitting programs administered by the Pennsylvania Department of Environmental Protection (DEP), the U.S. Army Corps of Engineers, the federal Environmental Protection Agency (EPA), and the Occupational Safety and Health Administration (OSHA), as well as Pennsylvania Historical & Museum Commission (PHMC) clearances, Pennsylvania Natural Diversity Inventory (PNDI) clearances, construction stormwater permitting, sewage facilities planning, and environmental covenants.
Errin is regularly invited to speak and write on environmental law topics. He has contributed to the Pennsylvania Bar Institute’s Pennsylvania Environmental Law and Practice e-book and presented at the Environmental Law Forum on water law impacts on potential site development.
Penn State University, Dickinson School of Law, J.D.
Penn State University, Schreyer Honors College, B.S., political science
Pennsylvania
Pennsylvania Supreme Court
U.S. District Court for the Middle District of Pennsylvania
U.S. District Court for the Eastern District of Pennsylvania
McNees Rising Star Award, 2021
Bellwood-Antis Public Library, Board of Trustees
PBA Section on Environmental and Energy Law
Related news and insights
Explore recent thought leadership, news, and other updates.
PBI – Breaking Down Microplastics: From Contamination to Compliance 2025
Errin McCaulley, Jr. spoke at the Pennsylvania Bar Institute (PBI)’s program “Breaking Down Microplastics: From Contamination to Compliance 2025” on December 15, offering practical insight into how microplastics are being detected, regulated, and addressed across Pennsylvania. The program, co‑sponsored by PBI’s Environmental & Energy Law Section, examined statewide research findings, emerging legislative and regulatory activity, […]
Blog post
USEPA Promulgates PFAS Drinking Water Standards and Designates Two PFAS Substances As Hazardous Substances – What Does It Mean For You?
by Scott Gould, Terry Bossert, Errin McCaulley, Brigid Khuri In April, the Environmental Protection Agency (“USEPA”) took two actions regarding per- and polyfluoroalkyl substances (“PFAS”), or so-called “forever chemicals,” that could have far-ranging implications. Drinking Water Standards First, USEPA established the first enforceable drinking water standards for PFAS chemicals. USEPA established Maximum Contaminant Levels (“MCL”) for […]
Legal alert
Major environmental permitting reforms advance in Pennsylvania budget law
by Kevin Sunday – McNees GR, Scott Gould and Errin T. McCaulley, Jr. – McNees Wallace & Nurick The saga over enacting the Pennsylvania state budget for the 2025-26 fiscal year has concluded, including some of the most significant permitting changes the state has enacted in years. Among the bills signed on November 12, Governor […]
Advises businesses and institutions in energy regulation. Supports complex transactions, renewable energy, regulatory compliance, and market strategies.
Advises on environmental compliance, permitting, and remediation. Litigates toxic tort claims and provides environmental due diligence for M&A and real estate.
Serves large commercial and industrial clients in the Energy and Environmental Law Group. Supports clients with state and federal regulatory and litigation matters.
