Derrick Price Williamson
Co-Chair, Utility, Energy & Communications Law Group | Member in Charge of Harrisburg Office
Harrisburg, PA
office 717.795.2741
mobile 717.254.9499
  • Overview
  • Services
  • Distinctions
  • Admissions
  • Memberships
  • Publications & Presentations
  • Community Involvement
  • Resources

Mr. Williamson's primary areas of practice are public utility and energy law. He is Co-Chair of the firm's Utility, Energy & Communications Law Group.


  • University of Maryland, B.A., summa cum laude, Phi Beta Kappa
  • Duke University School of Law, J.D., Research Editor, Duke Environmental Law & Policy Forum


  • Representing clients before state public service/utility commissions and appellate courts
  • Counseling manufacturing, institutional, and industrial clients regarding the procurement of energy services, including the analysis and negotiation of natural gas and electricity supply contracts
  • Substantial experience in legislative development, implementation, and regulation associated with electric industry restructuring and telecommunications competition in Pennsylvania and West Virginia
  • Counsel for over 20 years to the West Virginia Energy Users Group, a state-wide group of large industrial and manufacturing interests that collectively consume 4 billion kWh of electricity annually in West Virginia
  • Litigating electric and natural gas rate cases and merger cases
  • Representing end-users with respect to energy efficiency, demand-response, and on-site generation issues
  • Adjunct Professor, Duquesne University School of Leadership and Professional Advancement, 2006 - 2014
  • Veteran, United States Army
Energy Law Environmental Law Litigation Shale Gas Law Utility Law West Virginia Energy Users Group


  • Recognized by The Best Lawyers in America as "Lawyer of the Year" 2016 in Harrisburg, Pa. for Energy Law
  • Nominated by peers for inclusion in The Best Lawyers in America® in the area of Energy Law


  • Pennsylvania
  • United States Court of Appeals, District of Columbia Circuit
  • United States District Court for the Middle District of Pennsylvania


  • American Bar Association, Public Utility, Communications and Transportation Law Section
  • Pennsylvania Bar Association, past Chair, Public Utility Law Section
  • Dauphin County Bar Association, Equal Professional Opportunity Committee

Publications & Presentations

Community Involvement

  • Board Member and Past President, Cumberland Valley Eagle Foundation, 2004 - 2016
  • Head Coach and Board Member, HMMS Youth Soccer Association, 1997 - 2016
Currents - Energy Industry Insights: Issue 2, 2018 Currents - Energy Industry Insights: Issue 16, 2017 Currents - Energy Industry Insights: Week of October 29, 2017 Currents - Energy Industry Insights: Week of September 10, 2017 62 Spilman Attorneys Recognized by Best Lawyers 2017 18 W.Va.-based Spilman Attorneys Recognized by Super Lawyers SCOTUS Stays the Implementation of the Clean Power Plan 6 Spilman Attorneys Recognized as “Lawyers of the Year” 2016  57 Spilman Attorneys Recognized by Best Lawyers 2016 56 Spilman Attorneys Recognized by Best Lawyers 2015