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William M. Keyser

Fax +1.202.778.9100

William Keyser, a partner in Washington, D.C., focuses his practice on regulatory litigation and transactions involving the nation’s electricity and capacity markets. Will represents clients before the Federal Energy Regulatory Commission (FERC), the Department of Energy, federal and state courts and state public utility commissions. His clients include electric utilities, transmission providers, independent power providers, energy storage developers, hydro electric power producers, power marketers, public utility holding companies, and debt and equity investors. Will has represented and counseled clients on matters including mergers and acquisitions, transmission rates and cost allocation, interconnection procedures and agreements, market-based and cost-based sales of energy, renewable portfolio standards, interlock issues, FERC’s e-Tariff requirements, and participation in regional transmission organizations.


Prior to joining K&L Gates, Mr. Keyser served as a law clerk for the U.S. Nuclear Regulatory Commission’s Atomic Safety and Licensing Board Panel.  As a law clerk, he participated in a number of licensing proceedings including proceedings involving nuclear reactors, low-level waste facilities and the siting of a proposed independent storage facility.


  • Selected as one of The Best Lawyers in America for work in Energy Law by Best Lawyers (2018, 2019)

Additional Information

  • Panel Discussion: Making Sense of FERC Order 1000 Filings—How They Will Work, Impacts on Transmission Development in the West, Moderator, Transmission Summit West, September 2013
  • Panel Discussion: Utility Perspectives on Joint Ventures and Upcoming Project Plans, Moderator, Transmission Summit East, February 2013
  • Represented unregulated subsidiary of large utility in performing regulatory due diligence and obtaining necessary regulatory approvals to acquire and operate multiple utility-scale solar facilities in California
  • Represented energy storage developer in obtaining Exempt Wholesale Generator status and market-based rate authority
  • Represented solar facility owners in negotiating amendments to numerous interconnection agreements with regional transmission operators
  • Represented unregulated utility subsidiary in negotiating shared facilities agreement to govern the connection of multiple solar facilities to transmission grid and obtaining necessary FERC approvals of agreement
  • Represented unregulated subsidiary of major utility in obtaining necessary regulatory approvals required to enter into a joint venture for ownership of portfolio of solar projects
  • Represented a public utility in defending against a challenge to the annual update of its transmission formula rate
  • Represented an independent power producer in Montana in negotiating a large generator interconnection agreement (LGIA) and transmission service agreements associated with its expansion of a hydro electric generation facility
  • Represented a public utility holding company and its subsidiaries in complying with FERC’s interlock requirements
  • Represents a transmission owner in a FERC proceeding to determine the proper cost allocation methodology to be used for high voltage transmission facilities in PJM Interconnection, L.L.C. (PJM)
  • Represented a Pennsylvania public utility holding company in the $7.6 billion acquisition of two electric utility companies in Kentucky
  • Represented hydro electric power producer in headwater benefits proceeding
  • Represented entity in underwater hydroelectric licensing proceeding
  • Represented several public utilities in complying with FERC’s e-Tariff filing requirements
  • Represented a Pennsylvania public utility in obtaining FERC approval for its formula transmission rates
  • Represented a generation owner in protesting the results of its host transmission owner’s Simultaneous Import Limitation Study
  • Represented a public utility in obtaining transmission rate incentives for its $700 million 500 kV transmission line in PJM
  • Represented a transmission owning public utility in modifying its depreciation rates as they are applied in its transmission formula rates
  • Represented a Maine independent power producer in defending against challenges to its market-based rate authority
  • Represented a coalition of PJM transmission owners in defending a FERC order approving a cost allocation methodology for high voltage transmission projects in PJM in the U.S. Court of Appeals for the Seventh Circuit
  • Represented a biomass plant in obtaining certification as a renewable energy facility in Connecticut
  • Represented a public utility in defending a FERC order approving its market-based rate authority in the U.S. Court of Appeals for the Ninth Circuit