Derrick Williamson

Derrick Williamson is a Member at Spilman Thomas & Battle. He is Co-chair of the law firm's Utility, Energy, & Communications Law Group and is Managing Member of the firm’s Greater Harrisburg office. 

Derrick practices in the area of Public Utility Law; he has over 30 years of experience, principally representing large commercial, manufacturing, industrial, and institutional consumers of electricity and natural gas before state and federal utility/energy commissions and appellate courts. He also advises clients regarding the negotiation and procurement of utility services, as well as issues related to on-site generation, demand response, and renewable energy procurement. Derrick also serves as Executive Director of WVEUG, working with the Chair and Vice Chair of the organization to shape energy rates and public policy on behalf of its members. 

A graduate of the University of Maryland and Duke University School of Law, he has been selected by his peers for inclusion in The Best Lawyers in America for energy law for multiple years. In fact, he earned the distinction of being selected as the Best Lawyers’ Energy Law "Lawyer of the Year" in Harrisburg, Pennsylvania, in both 2016 and 2020.

Derrick also serves as an Adjunct Professor at Penn State’s Dickinson School of Law, teaching Administrative Law and Energy Law & Policy. 

Derrick is a Veteran of the United States Army. He is active in furthering Veterans' support and diversity initiatives in the legal field. He holds positions on the Military and Veterans Affairs Committee of the Pennsylvania Bar Association, as well as on the Equal Professional Opportunity Committee of the Dauphin County Bar Association.