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Mark Perlis

Mark Perlis is a seasoned energy and environmental attorney with a broad-based federal regulatory and litigation practice encompassing all aspects of the electric utility industry.  He regularly represents clients in adjudicatory and rulemaking proceedings before the Federal Energy Regulatory Commission and state public utility commissions, and in stakeholder proceedings conducted by ISOs and RTOs across the country.  Mark represents independent power producers, power marketers, traditional electric utilities, and renewables developers.  Mark specializes in regulatory issues associated with the design of and participation in organized electric markets, including energy and capacity markets, generation interconnection, and transmission service.

Mark has led representations of numerous clients faced with non-public, FERC enforcement investigations and has negotiated favorable settlements with the FERC Office of Enforcement.  He also regularly advises companies on compliance policies and procedures and conducts compliance program audits and reviews.  In addition, he counsels clients across the industry on Department of Energy efficiency regulations, energy trading compliance, project development, commercial agreements, and contract disputes.

Mark also advises clients in the electricity industry and in the biofuels and biotechnology industries on matters pertaining to federal and state responses to climate change.  He advises clients on U.S. EPA’s Clean Power Plan and potential state implementation plans.  He also advises producers of conventional ethanol and advanced biofuels on federal and state regulatory issues, including the federal Renewable Fuels Standard program, California’s Low-Carbon Fuels Standard, and emerging markets for Renewable Identification Numbers and Low-Carbon Fuel credits.  Mark has also advised clients on trading emission allowances and credits, including for sulfur dioxide and carbon dioxide, as well as on renewable energy credit trading.

On August 26, 2026, President Trump issued Executive Order 14421, Declaring a National Emergency to Secure the United States Bulk-Power System. The Order establishes a new national security regulatory framework for a broad range of equipment, software, services, and supply chain relationships associated with the U.S. electric grid. Although the Order is framed as a grid security measure, its implications extend well beyond utilities.

Equipment manufacturers, project developers, utilities, contractors, lenders, investors, data center operators, and others participating in the energy sector may all be affected. The Order introduces new restrictions and uncertainty into energy infrastructure procurement and supply chains and, critically, it represents a fundamental shift in how the federal government approaches security risks in the energy sector.

Continue Reading The Electric Grid’s ICTS Moment? New National Security Executive Order Targets Foreign-Sourced Energy Equipment