Atty. Gregory Eisenstark
Greg has wide-ranging experience representing public utilities, unregulated energy companies, electric generation companies, educational and governmental institutions, and other industry participants. He maintains a comprehensive energy and utility regulatory and transactional practice, with expertise in base rate cases, rate clause filings, reliability issues, public utility project siting petitions and appeals, mergers and acquisitions, renewable energy (including solar and offshore wind projects), demand response and energy efficiency issues, regulatory audits, provider of last resort and c
Energy Law Attorney · Serving Cherry Hill, NJ
Profile Summary
About Gregory Eisenstark at a Glance
Gregory Eisenstark is a energy attorney based in Cherry Hill, New Jersey, practicing at Cozen O'Connor. Admitted to practice in New Jersey, United States, Pennsylvania, United States, New York, United States, and United States, United States Court of Appeals for the Third Circuit. Educated at Rutgers University–Newark (J.D., 1991) and Oberlin College (BA, 1984). Recognitions include Best Lawyers in America — Energy Law (2026), Best Lawyers in America — Additional Areas of Practice: (2026), and Best Lawyers in America — Energy Regulatory Law (2026). Serves clients in Cherry Hill, NJ and the surrounding metropolitan area.
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About Gregory Eisenstark
- Greg has wide-ranging experience representing public utilities, unregulated energy companies, electric generation companies, educational and governmental institutions, and other industry participants
- He maintains a comprehensive energy and utility regulatory and transactional practice, with expertise in base rate cases, rate clause filings, reliability issues, public utility project siting petitions and appeals, mergers and acquisitions, renewable energy (including solar and offshore wind projects), demand response and energy efficiency issues, regulatory audits, provider of last resort and competitive third-party supplier issues, and utility financing issues
- He has experience in administrative rulemaking, drafting legislation, and counseling on energy policy issues, as well as appellate experience in both state and federal courts
- Greg has litigated hundreds of utility rate and regulatory filings to successful completion
- Since the early 1990s, he has handled many base rate cases involving water, wastewater, natural gas, and electric utilities
- Prior to private practice, Greg served as associate general regulatory counsel for Public Service Enterprise Group (PSEG), where he represented PSEG's operating companies in regulatory matters before the New Jersey Board of Public Utilities, the Federal Energy Regulatory Commission, other state utility commissions, and in state and federal courts
- Earlier in his career, Greg was managing attorney – electric for the New Jersey Division of Ratepayer Advocate, where he represented utility customers in matters before regulatory agencies and courts
- In that capacity, Greg played an active role in the transformation of the PJM Interconnection from a power pool to an independent system operator
- Before that, Greg was a deputy attorney general of New Jersey, where he represented the Board of Public Utilities and Department of Environmental Protection in utility and solid waste industry matters
- Speaking Engagements He has spoken on energy and utility issues for the New Jersey Institute of Continuing Legal Education, the New Jersey State Bar Association, and at other industry conferences
- He has also been a guest lecturer on utility rate issues at Rutgers University School of Law and Seton Hall University School of Law
- Rankings & Accolades Greg has been ranked by Chambers & Partners USA and has also been elected to The Best Lawyers in America for Energy Law since 2016
- In addition, he was selected by Best Lawyers as a New Jersey "Lawyer of the Year" for Energy Law in 2019 and 2021
Practice Areas Explained
Gregory Eisenstark's Areas of Legal Practice
Each practice area below reflects the types of cases Gregory Eisenstark handles, with a practical overview of what that area of law involves and how it may apply to your situation in Cherry Hill.
Energy & Utilities Law in Cherry Hill
Energy attorneys for oil & gas, renewables, utility regulation, and energy sector transactions.
Gregory Eisenstark is one of 35,985 energy attorneys indexed nationally. Browse energy attorneys in New Jersey →
Jurisdictional Context
Why Local Counsel Matters in Cherry Hill
Practicing law in New Jersey. Legal matters in New Jersey are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Cherry Hill are typically filed in the local municipal court or the appropriate New Jersey state district court, depending on subject matter and amount in controversy. An attorney licensed in New Jersey brings working knowledge of local procedural deadlines, judicial practices in this venue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in New Jersey courts without local counsel or pro hac vice admission.
Cherry Hill Courts and Legal Process
Choosing a Cherry Hill-based attorney means your counsel already knows the local docketing timelines, preferred filing formats, and how individual judges typically rule on procedural motions — details that only come from practicing in this jurisdiction day after day. That local familiarity can translate to better strategy, faster filings, and fewer costly surprises.
Looking for additional New Jersey attorneys? Browse all attorneys in Cherry Hill or all attorneys in New Jersey.
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Professional Profile
Why Clients in Cherry Hill Choose Gregory Eisenstark
Selecting an attorney is one of the most consequential decisions you can make when a legal matter arises. Below are the core qualities that distinguish Gregory Eisenstark's practice in the field of energy.
Multi-State Bar Admission
Licensed in New Jersey, United States, Pennsylvania, United States, and New York, United States, Gregory Eisenstark can represent clients in cases that span state lines or require counsel in multiple jurisdictions.
Focused Energy Practice
Concentrating on energy means Gregory Eisenstark's knowledge of relevant statutes, case law, and procedural nuances stays current — unlike generalist practices that spread attention across unrelated fields.
Local Presence in Cherry Hill
A Cherry Hill-based practice means Gregory Eisenstark attends hearings in the same courthouses, knows the local clerks, and understands the unwritten scheduling norms that affect every case filed here.
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