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Mark Haskell advises his clients on matters related to the U.S. Federal Energy Regulatory Commission (“FERC”), including FERC investigations, litigation and related court appeals, and Commodity Futures Trading Commission (“CFTC”) investigations affecting the energy industry.Mark represents natural gas and power marketers, local distribution companies, end-users, producers, industrial consumers, and liquefied natural gas (“LNG”) and shale gas developers in energy regulatory matters.As a natural gas litigator, he handles administrative litigation for shippers affected by interstate natural gas pipeline rates, terms, and conditions of service. This work has previously involved many interstate pipeline systems. He has assisted clients in rulemaking proceedings, including FERC’s anti-manipulation rules and pipeline restructuring matters. He also addresses commercial and regulatory issues in the United States for LNG and shale gas developers.Mark represents shippers in litigation under the U.S. Interstate Commerce Act as it relates to rates, terms, and conditions of service for regulated common carrier transportation of oil and natural gas liquids. He also assists producer/shippers involved in new common carrier pipeline development projects or pipeline expansions.He manages FERC and CFTC investigations of physical and financial energy commodity trading and handles investigations of electric reliability-related incidents. He also develops compliance plans, pursues internal investigations, and develops energy compliance training.Mark provides compliance-related regulatory due diligence in connection with acquisitions. He brings to his energy litigation practice experience defending gas and power refund claims associated with regulatory changes, market dislocations, and allegations of market manipulation.Chambers USA states that Mark adeptly advises his clients across the full gamut of oil and gas-related regulatory matters. He is “supremely knowledgeable of the industry and is a dean of the enforcement defense Bar,” reports a client. According to another source, Mark “is incredibly detail-oriented, extremely knowledgeable and always up to speed with changing market trends.” Chambers Global reported that clients say the Mark is “[o]ne of the best oil and gas attorneys in the country. He is top-notch.” And “[a] brilliant man with a brilliant mind; he’s very well respected in the industry.” One Chambers&nbsp;source says, “Mark has an encyclopedia of knowledge in the FERC. It is truly astonishing how much he knows.”

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FERC Imposes $1.1 Billion Penalty for Alleged ‘Brazen’ Capacity Market Fraud

Chambers Global 2026 Recognizes Blank Rome Attorneys and Practices

FERC Issues Order Clarifying Data Center and Large Load Interconnection Procedures in PJM

Mark R. Haskell and James R. Murray Named Exclusive 2026 Lexology Client Choice Award Winners

FERC Affirms Texas LNG Export Project on Remand and Rejects Attempts to Enlarge Diminished Scope of Environmental Review

Blank Rome Attorneys Recognized in 2026 Best Lawyers in America®

Blank Rome Attorneys and Practices Highly Ranked in The Legal 500 United States 2025

Chambers USA 2025 Recognizes Blank Rome Attorneys and Practices

Public & Administrative Law 2025 – USA

Chambers Global 2025 Ranks Blank Rome Attorneys and Shipping, Energy, International Trade, and Bankruptcy & Restructuring Practices

LNG by Rail: The D.C. Circuit Vacates a DOT Rulemaking and Outlines a Path for Challenges Yet to Come

LNG by Rail:  The D.C. Circuit Vacates a DOT Rulemaking and Outlines a Path for Challenges Yet to Come

Blank Rome Attorneys Recognized in 2025 Best Lawyers in America®

Chambers USA 2024 Recognizes Blank Rome Attorneys and Practices

Chambers Global 2024 Ranks Blank Rome Attorneys and Shipping, Energy, and Bankruptcy & Restructuring Practices

Mark R. Haskell Named Exclusive 2024 Client Choice Award Winner by Lexology

Blank Rome Attorneys Recognized in 2024 Best Lawyers in America®

In Order No. 2023, FERC Takes Step in Reforming Transmission Grid Policies by Enacting Generator Interconnection Reforms

Blank Rome Attorneys and Practices Highly Ranked in The Legal 500 United States 2023

Mark R. Haskell

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