How much does it cost to hire David for a energy case?

Cost depends on the type of matter, the fee model (contingency, flat, hourly), and how contested the case becomes. David walks through the likely range during the consult so there are no surprises.

Does David offer a free consultation?

David charges for the initial consult; that fee is credited toward representation if you retain David's office. Some energy attorneys offer free consults — check David's current terms during booking.

How long do energy cases in Pennsylvania typically take?

Simple energy matters can wrap in a few weeks; disputed cases can run 6–18 months from intake to resolution, longer if the matter goes to trial. David gives a realistic estimate for your facts at the consult — vague answers here are a red flag.

Can David take my case if I'm outside Philadelphia?

David is licensed in Pennsylvania. Matters governed by Pennsylvania law are the natural fit. Out-of-state matters are handled case-by-case, sometimes with local co-counsel. Ask during intake — David will tell you if the case is a fit or refer you to someone closer to your court.

What should I bring to my first meeting with David?

Bring every document that touches the dispute: contracts, correspondence, police or medical reports, filed pleadings, invoices, photographs, insurance letters. Also bring a written timeline of what happened, in your own words. David will filter what matters — over-preparing at intake is always cheaper than needing a second meeting.

Is David accepting new energy clients right now?

David's intake status shifts week to week. Submit the form; the office will confirm availability or refer the matter out.

David G. Mandelbaum, Energy Attorney in Philadelphia

Quick answer

David G. Mandelbaum is a shareholder; co-chair, environmental practice based in Philadelphia, PA. The practice focuses on Energy, Environmental, and General. Currently practicing at Greenberg Traurig, LLP. Rated 5.0 out of 5 from 1 client review.

Based in: Philadelphia, PA
Experience: attorney
Known for: Energy · Environmental · General

Handles Energy, Environmental, and General matters from Philadelphia, PA.
Recognized with AV Preeminent.

Areas of practice

Practice areas handled by David G. Mandelbaum

David concentrates on energy, environmental, general, government, and litigation. Each area below outlines the kind of case David handles, typical outcomes to expect, and how the intake process starts.

Energy cases in Philadelphia, Pennsylvania

David takes energy matters in Philadelphia, Pennsylvania. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before David agrees to represent you.

Environmental cases in Philadelphia, Pennsylvania

David takes environmental matters in Philadelphia, Pennsylvania. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before David agrees to represent you.

General cases in Philadelphia, Pennsylvania

David takes general matters in Philadelphia, Pennsylvania. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before David agrees to represent you.

Government cases in Philadelphia, Pennsylvania

David takes government matters in Philadelphia, Pennsylvania. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before David agrees to represent you.

Litigation cases in Philadelphia, Pennsylvania

David takes litigation matters in Philadelphia, Pennsylvania. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before David agrees to represent you.

Biography

About David G. Mandelbaum — Attorney of Pennsylvania energy experience

David G. Mandelbaum is a shareholder; co-chair, environmental practice based in Philadelphia, PA. The practice focuses on Energy, Environmental, and General. Currently practicing at Greenberg Traurig, LLP. Rated 5.0 out of 5 from 1 client review.

David G. Mandelbaum represents clients facing problems under the environmental laws. He regularly represents clients in lawsuits and also has helped clients achieve satisfactory outcomes through regulatory negotiation or private transactions. A fellow of the American College of Environmental Lawyers, David teaches Superfund, and Oil and Gas Law in rotation at the Temple University Beasley School of Law as well as an environmental litigation course at Suffolk (Boston) Law School.

Mr. Mandelbaum has been engaged in matters involving allocation of costs among responsible parties, especially under the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA). He has tried large cases and resolved others as lead counsel. He has written, spoken, and taught extensively on the subject. He also has been engaged to assist lead counsel from this firm and others:

•to develop cost allocation methodologies;
•to craft expert testimony in support of a favored methodology (given a definition of “fairness,” why one methodology better tracks it than another);
•to develop efficient case management approaches;
•to manage portfolio of contaminated properties and related risks and litigation; and
•to assist private allocation as part of a neutral team.

Mr. Mandelbaum has advised clients on specific compliance and enforcement questions, and broader issues of compliance management systems, sustainability policies, and, more recently, strategies concerning “ESG.” He has been engaged to assist in the development of offshore wind and onshore alternative energy projects as well as the redevelopment of contaminated properties.

Judicial Clerkships

•Hon. Louis H. Pollak, U.S. District Court for the Eastern District of Pennsylvania

Recognition & Leadership

Awards & Accolades

•Honoree, Pennsylvania Bar Association Environmental and Energy Law Section, 'Environmental Law Lifetime Achievement Award,' 2022
•Listed, Chambers USA Guide, 2003-2025 (Band 1 in each edition)
•Listed, The Best Lawyers in America, Environmental Law; Litigation - Environmental; Water Law, 2006-2026
•'Lawyer of the Year,' Litigation - Environmental, Philadelphia, 2016 and 2024
•'Lawyer of the Year,' Environmental Law, Philadelphia, 2015 and 2018
•Listed, Who's Who Legal, 2013-2022
•Thought Leaders - USA, Environment, 2023
•Global Leader, Environment, 2013-2022
•Listed, Euromoney's Expert Guide to the World’s Leading Experts in Environmental Law, 2017-2021
•Listed, The Legal 500 United States, 2014-2025
•Environment - Litigation, 2014-2024
•'Recommended Lawyer,' 2022 and 2024
•'Other Key Lawyer,' 2022 and 2023
•Environment - Regulatory, 2018-2024
•'Other Key Lawyer,' 2022 and 2023
•Dispute Resolution - Product Liability, Mass Tort and Class Action - Toxic Tort - Defense, 2018-2019, 2021, and 2024-2025
•Listed, Boston magazine, 'Top Lawyers - Land Use Environment,' 2022-2023
•Listed, Super Lawyers magazine, Pennsylvania Super Lawyers, 2004-2025
•Team Member, Law360 “Environmental Practice Group of the Year,” 2022
•Team Member, The American Lawyer’s “Regional Litigation Department of the Year - Pennsylvania,” Finalist, 2018
•Team Member, U.S. News - Best Lawyers , Best Law Firms Edition, 'Law Firm of the Year,' Environmental Law, 2016
•Selected, National Law Journal magazine, 'Energy & Environmental Trailblazer,' 2015
•Rated, AV Preeminent 5.0 out of 5.0

Working with David on a energy matter

David G. Mandelbaum represents clients facing problems under the environmental laws. He regularly represents clients in lawsuits and also has helped clients achieve satisfactory outcomes through regulatory negotiation or private transactions. A fellow of the American College of Environmental Lawyers, David teaches Superfund, and Oil and Gas Law in rotation at the Temple University Beasley School…

Clients David works with

David reviews new inquiries case-by-case for energy, environmental, and general matters in Philadelphia and the surrounding Pennsylvania area.

Credentials

David G. Mandelbaum's legal education and bar admissions

Harvard Law School
J.D. · 1983
Harvard College
A.B. · 1980

David studied at J.D. in Harvard Law School and A.B. in Harvard College.

Law school and academic background

David completed J.D. in Harvard Law School and A.B. in Harvard College. Formal legal training is one signal of substantive knowledge — the day-to-day practice David runs in Pennsylvania is where that training gets applied to real client questions.

Recognition

Awards, publications, and recognition of David G. Mandelbaum

David has received 1 formal recognition from bar associations, industry bodies, and peer-review services.

AV Preeminent

Legal awards and honors

AV Preeminent.

Locations

David G. Mandelbaum's office in Philadelphia

David's primary office is at 1717 Arch Street, Suite 400, Philadelphia, PA, 19103. In-person meetings are by appointment; a phone intake usually comes first.

Main office

Greenberg Traurig, LLP

1717 Arch Street, Suite 400

Philadelphia, PA 19103

Open in Google Maps

Client feedback

Client reviews of David G. Mandelbaum — 5.0/5 rating from 1 verified client review

Every review below is from a verified client of David. Reviews cover communication, case outcome, and value — the three signals that matter most when comparing energy attorneys in Philadelphia.

5.0

1 client review

Client ratings are sourced from public records and editorial research. Reviews on LawyersListed are accepted from verified clients once David G. Mandelbaum claims this profile.

Read all reviews

Hiring guide

How to hire David G. Mandelbaum — what to expect in your first consultation

Working with a new energy attorney should feel structured. Here's how the first two conversations with David usually go, from the moment you request a consult to the day representation begins.

Consultation formats and pricing

David charges for the initial consult. That fee is credited toward representation if you retain David's office.

What to bring to your first meeting

Bring any documents you already have — police reports, medical records, filed pleadings, correspondence from an insurer, a copy of the contract at issue. If you're not sure, err on the side of bringing everything; David will tell you what matters and what doesn't.

Questions to ask a energy attorney in Philadelphia, Pennsylvania

A short list to run through before you commit: How many energy matters have you handled in the last year? What's your fee structure? Who else in the office will work on this? What's your realistic estimate of timeline and range of outcomes? How do I reach you between meetings?

Fees & payment

Fees, payment methods, and consultation options for David

David discusses fees during intake so the arrangement fits the matter. Contingency, hourly, and flat-fee options are all common in energy practice — ask which fits.

Hourly rates, contingency fees, and flat-fee options

Every energy matter is priced differently. Simple document review might be a flat fee. Injury litigation is often contingency. Complex commercial disputes usually run hourly with a retainer. David confirms the model in the engagement letter before any work starts.

Payment methods and payment plans

David's office accepts standard payment methods. Ask about payment plans if the retainer is a stretch — many energy practices work with clients on structured schedules.

Frequently asked

Frequently asked questions about David G. Mandelbaum

How much does it cost to hire David for a energy case?
Cost depends on the type of matter, the fee model (contingency, flat, hourly), and how contested the case becomes. David walks through the likely range during the consult so there are no surprises.
Does David offer a free consultation?
David charges for the initial consult; that fee is credited toward representation if you retain David's office. Some energy attorneys offer free consults — check David's current terms during booking.
How long do energy cases in Pennsylvania typically take?
Simple energy matters can wrap in a few weeks; disputed cases can run 6–18 months from intake to resolution, longer if the matter goes to trial. David gives a realistic estimate for your facts at the consult — vague answers here are a red flag.
Can David take my case if I'm outside Philadelphia?
David is licensed in Pennsylvania. Matters governed by Pennsylvania law are the natural fit. Out-of-state matters are handled case-by-case, sometimes with local co-counsel. Ask during intake — David will tell you if the case is a fit or refer you to someone closer to your court.
What should I bring to my first meeting with David?
Bring every document that touches the dispute: contracts, correspondence, police or medical reports, filed pleadings, invoices, photographs, insurance letters. Also bring a written timeline of what happened, in your own words. David will filter what matters — over-preparing at intake is always cheaper than needing a second meeting.
Is David accepting new energy clients right now?
David's intake status shifts week to week. Submit the form; the office will confirm availability or refer the matter out.

Community Q&A

Real questions asked by Pennsylvania residents in the last few months, answered by energy attorneys like David G. Mandelbaum. Each link opens the full answer thread.

Are There Legal Protections For Energy Consumers In Pennsylvania?
I’m a homeowner in Pittsburgh, Pennsylvania, and I've been receiving constant marketing calls from energy suppliers trying to sell me a fixed-rate plan. It feels invasive and misle
1 verified answer · Energy · Pennsylvania
Can I Sue An Energy Company For Unfair Practices In Delaware?
I live in Wilmington, Delaware, and have encountered numerous issues with my electric provider, including billing errors and poor customer service. I’m considering legal action. Wh
1 verified answer · Energy · Delaware
What To Do If My Phone Provider Is Also Charging For Utilities In North Carolina?
I live in Charlotte, North Carolina, and my phone company has started charging me for 'utility-like' services that I never agreed to. I feel like I’m being scammed. Is this even le
1 verified answer · Energy · North Carolina
Are There Regulations For Renewable Energy Providers In Massachusetts?
I'm interested in switching to a solar company in Boston, Massachusetts, but I've heard about some bad practices from other consumers. Are there specific regulations in place that
1 verified answer · Energy · Massachusetts
Is My Electric Company Allowed To Disconnect During Winter In Minnesota?
After living in Minneapolis for years, my electric company is threatening to shut off my power during the winter months because of unpaid bills. I am worried about my family's safe
1 verified answer · Energy · Minnesota
Can I Challenge An Energy Audit In South Carolina?
I'm a business owner in Columbia, South Carolina, and I received a notice that my energy usage is being audited by the utility company. I believe their calculations are incorrect a
1 verified answer · Energy · South Carolina

Areas served

Energy attorneys serving Philadelphia, Pittsburgh and Harrisburg in Pennsylvania

David handles energy matters throughout Pennsylvania. Each city below is a direct link into the search page for verified energy attorneys in that community.