William Roberts practices as Of Counsel from the firm's Boston office. His practice has a national range and its scope involves FERC and NERC compliance, mergers and acquisitions, wholesale power market design, energy project development, appearance before state and federal regulatory commissions, legislative initiatives and energy transactional and contractual work.

He has advised CEOs, executives, board members and business units on deal execution, suitability, compliance, and development issues in the energy field. He has 14+ years of experience working on development, operations, trading, compliance and legal matters for a Fortune 500 company in its Independent Power Producer Division as in-house counsel.

William has coordinated and advised on M&A, project development, compliance, strategy and policy with senior management and business units handling renewable energy, FERC regulation, transmission, operations, public affairs, environmental, and markets. He is able to translate legal requirements into succinct and meaningful business operating principles and procedures.

He has extensive experience with the Federal Energy Regulatory Commission (“FERC”) and the North American Electric Reliability Corporation ("NERC") regulations, compliance and enforcement. His experience includes and dates back to and before Order 2000 created open access transmission for generator interconnection and enactment by FERC of the Energy Policy Act of 2005.

He was a founding member of the Members’ Committees at the New York Independent System Operator (NYISO) and New England Independent System Operator (ISO-NE) where he helped developed governance and stakeholder policy and assisted in the policy development and design of regional electric wholesale market rules and regulations.

Prior to joining Preti Flaherty, William served as Associate General Counsel at First Wind Energy in their Boston Office, where he oversaw the regulatory and compliance matters for the development and operations of their utility scale wind facilities. Prior to that William was Director Senior Counsel with Edison Mission Energy. At Edison Mission he was responsible for FERC and NERC compliance, trading and transactional legal matters.

He is a native of St. Louis and currently lives near Boston, MA. His hobby is fine woodworking. He builds furniture and keepsake boxes for friends and family.

Practice Areas


  • Suffolk University Law School (J.D., cum laude)
  • Suffolk University (M.B.A.)
  • New Jersey Institute of Technology (B.S., cum laude)
    • Electrical Engineering


  • Massachusetts