Atty. Caleb Holmes
Caleb’s practice focuses on complex environmental litigation and environmental compliance. Caleb has represented clients in state and federal courts and in administrative proceedings.
Environmental Law & More Attorney · Serving Philadelphia, PA
Profile Summary
About Caleb Holmes at a Glance
Caleb Holmes is a litigation and environmental attorney based in Philadelphia, Pennsylvania, practicing at Greenberg Traurig. Educated at Vermont Law School (—, 2007). Recognitions include Best Lawyers in America — Environmental Law (2026) and Best Lawyers in America — Litigation - Environmental (2026). Serves clients in Philadelphia, PA and the surrounding metropolitan area.
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About Caleb Holmes
Caleb’s practice focuses on complex environmental litigation and environmental compliance. Caleb has represented clients in state and federal courts and in administrative proceedings. In his environmental litigation practice, Caleb often represents corporate clients in cost recovery, contribution and government enforcement actions under Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA). Caleb has litigated such matters through trial and has also helped clients negotiate and settle matters. He has worked with clients on cases involving a wide variety of contaminants, including but not limited to PCBs, PFAS, and dioxins. Caleb also has broad experience litigating complex commercial litigation, including products liability and mass tort/toxic tort matters. He has a depth of experience with all aspects of discovery, including work with experts, taking and defending depositions, motion practice, trial preparation and settlement negotiation.
Caleb provides practical advice to clients in the acquisition and disposition of businesses and assets and the re-development of brownfield sites. He works with clients to achieve compliance with state-specific voluntary cleanup programs, including Pennsylvania’s Land Recycling Program (Act 2).
Caleb counsels clients on compliance with a broad range of federal and state environmental laws, including RCRA, the Clean Air Act, the Clean Water Act, and a host of other federal and state environmental laws.
In addition to his legal work, Caleb is active in various professional and civic organizations. He is currently serving as the Council’s Secretary for the Pennsylvania Bar Association’s Environmental and Energy Law Section.
Concentrations- Air, water and waste regulation
- Superfund and contamination
- Oil and gas development
Practice Areas Explained
Caleb Holmes's Areas of Legal Practice
Each practice area below reflects the types of cases Caleb Holmes handles, with a practical overview of what that area of law involves and how it may apply to your situation in Philadelphia.
Civil Litigation in Philadelphia
Civil litigation attorneys for breach of contract, business disputes, civil rights, and class action lawsuits.
Caleb Holmes is one of 450,751 litigation attorneys indexed nationally. Browse litigation attorneys in Pennsylvania →
Environmental Law in Philadelphia
Environmental attorneys for regulatory compliance, contamination, land use, and natural resource law.
Caleb Holmes is one of 55,977 environmental attorneys indexed nationally. Browse environmental attorneys in Pennsylvania →
Jurisdictional Context
Why Local Counsel Matters in Philadelphia
Practicing law in Pennsylvania. Legal matters in Pennsylvania are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Philadelphia are typically filed in the local municipal court or the appropriate Pennsylvania state district court, depending on subject matter and amount in controversy. An attorney licensed in Pennsylvania 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 Pennsylvania courts without local counsel or pro hac vice admission.
Philadelphia Courts and Legal Process
Choosing a Philadelphia-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 Pennsylvania attorneys? Browse all attorneys in Philadelphia or all attorneys in Pennsylvania.
Frequently Asked
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Professional Profile
Why Clients in Philadelphia Choose Caleb Holmes
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 Caleb Holmes's practice in the field of litigation and environmental.
Broad Practice Area Coverage
Covering litigation and environmental, Caleb Holmes can address the full spectrum of a client's legal needs without requiring referrals to separate specialists for each issue.
Local Presence in Philadelphia
A Philadelphia-based practice means Caleb Holmes 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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How People Find Caleb Holmes Online
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Caleb Holmes's Practice Areas & Specializations
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