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  • University of Baltimore School of Law , J.D., 1976
  • University of Virginia , B.A., 1969


District of Columbia; Maryland; U.S. Supreme Court; U.S. Court of Appeals for the First, Second, Third, Fourth, Fifth, Eighth, Ninth, Tenth and Eleventh Districts; U.S. Court of Appeals for the District of Columbia; U.S. District Court for the District of Columbia, U.S. District Court for the District of Maine

Greg Williams

Greg H. Williams

Of Counsel
Practice Focus: Federal Regulatory, Project Permitting, Energy Markets
Office: Washington, DC
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Greg Williams helps clients achieve their goals before federal regulators in his legal practice based in the firm's Washington, DC office. With his extensive experience as an energy and government affairs attorney, Greg assists U.S. and international clients on a variety of regulatory issues, particularly in the electrical and natural gas industries.

From securing approvals for the groundbreaking joint-ownership of a 200-mile greenfield pipeline development, to creating a new model of electric transmission organization, Greg has focused his practice on delivering creative regulatory solutions to meet client business objectives.

In his practice before FERC, he has been extensively involved in transmission and natural gas infrastructure and ratemaking, and he has helped clients navigate a variety of issues including merchant transmission, regional transmission organizations and market-rate authorization and sales.

In addition to his work on economic regulation, he has managed successful permitting processes for a wide range of energy generation and transmission projects before numerous federal agencies, including FERC, the U.S. Departments of Energy, Transportation and Interior, the Fish and Wildlife Service, the Army Corps of Engineers, the and Coast Guard.

Prior to joining Preti Flaherty, Greg practiced as a partner in the Washington office of an international law firm and, previously, worked as a trial and appellate attorney for the Solicitor's Office at FERC.

Precedent-Setting Efforts

Represented Portland Natural Gas Transmission System before FERC and other regulatory bodies in the successful development and installation of a 200-plus mile greenfield pipeline, including an unprecedented jointly-owned pipeline segment.

Represented Cross Sound Cable in the successful development, installation and ultimate sale of the first FERC-approved merchant transmission facility.

Represented SCE&G in the creation of the only for-profit RTO (GridSouth) accepted by FERC.

Negotiated for the Town of Harpswell, Maine a groundbreaking land-lease for a 1 Bcf/d LNG regasification project.

Counsels Statoil in the permitting, regulatory pricing, and grid interconnection of the first floating offshore wind facility.

Representative Matters

South Carolina Electric & Gas Company - general representation before FERC on all electric transmission matters.

Goldman Sachs - FERC certification of a 1 Bcf/d LNG terminal/pipeline in Calais, Maine.

Hydro Quebec - representation before FERC and ISO-NE on numerous regulatory matters, including representing HQ's affiliate in connection with its merchant transmission facility.

Entergy - consideration of a regulated vs. merchant transmission line extending from up-state NY generator into the NYC market.

Sithe Energy - successful litigation before FERC of $150 million generator/grid interconnection dispute.

Elsinore Valley Municipal Water District - FERC licensing of a 500 MW, hydro-electric pump-storage facility.

Deepwater Wind - consideration of merchant transmission access to NY/NE markets for offshore wind.

Riverbank Power - consideration of revised economic regulatory model for electric storage.

SCANA Energy Marketing - representation before FERC and Georgis PSC in SCANA's successful capture of a major share of newly unbundled retail gas market in Georgia.

Civic Involvement

  • Boys Hope Girls Hope of Baltimore, Maryland, Board of Directors 2011-Current

George, Greg, Williams
Greg Williams helps clients achieve their goals before federal regulators in his legal practice based in the firm's Washington, DC office.