Bob Co-Chairs the Energy & Environmental Group and serves on the Firm’s Management Committee. His practice focuses primarily on matters involving the state and federal regulation of electricity supply and delivery, natural gas supply and delivery, and petroleum products pipelines. Bob has appeared before state regulatory commissions in Pennsylvania, Connecticut, Georgia, Kentucky, Maryland, New Jersey, New York, Oklahoma, West Virginia, Virginia, Ohio; before the Federal Energy Regulatory Commission; and before various state and federal appellate courts. On electricity and natural gas matters, Bob generally represents the interests of high-volume consumers and consumer representatives and owners of cogeneration facilities, before federal and state administrative agencies and appellate courts. He also counsels clients regarding the competitive procurement and supply of utility services, including utility-scale renewable energy projects. Bob has counseled clients, and appeared in state and federal proceedings, regarding the regulation of oil and natural gas pipelines.


Bob’s client engagements over the past five years have addressed such topics as:

  • Wholesale electricity market design
  • Public Utility Regulatory Policies Act (“PURPA”) issues
  • Wholesale and retail energy supply and delivery transactions
  • FERC Office of Enforcement actions (self-reports; investigations)
  • Utility mergers and acquisitions
  • State and federal court appeals
  • Market-based rate authority and Public Utility Holding Company Act compliance
  • State and federal court appeals
  • Renewable energy projects (project development, physical and virtual power purchase agreements)
  • Market-based rate authority and Public Utility Holding Company Act compliance
  • Behind-the-meter generation and microgrid configurations
  • Electric transmission formula rates and allowed returns on equity
  • Petroleum products pipeline rate and tariff issues
  • Natural gas pipeline rate and tariff issues
  • Electricity, natural gas, and oil pipeline infrastructure development

Federal Energy Regulatory Commission, Attorney-Advisor, Office of Administrative Law Judges 1994-1996


American University, B.A., 1991, magna cum laude

Georgetown University Law Center, J.D., 1994, Law and Policy in International Business, Articles Editor; Subcouncil


DC Super Lawyer, 2016-present

The Best Lawyers in America®, Energy Law, 2013-present

Martindale-Hubbell, AV-Rated


Energy Bar Association – President – 2017-2018; Board of Directors, 2004-2009, 2012-2014, 2015-2019; Electric Utility Regulation Committee, Chair, 2001-2003; Judicial Review Committee, Chair, 2003-2004
Charitable Foundation of the Energy Bar Association, President, 2012-2013; Board of Directors, 2015-2018

Foundation of the Energy Law Journal – Board of Directors, 2015-2018

Pennsylvania Bar Association, Utility Law Section


U.S. Court of Appeals for the First Circuit

U.S. Court of Appeals for the Third Circuit

U.S. Court of Appeals for the Fourth Circuit

U.S. Court of Appeals for the Seventh Circuit

U.S. Court of Appeals for the Ninth Circuit

U.S. Court of Appeals for the District of Columbia Circuit

U.S. Supreme Court


Bar Admissions


District of Columbia



August 19, 2021 - 39 McNees Attorneys Recognized by Best Lawyers®, Six Named “Lawyer of the Year”

April 20, 2021 - McNees Attorney to Discuss Diversity in the Workplace at Lancaster Chamber Event

February 10, 2021 - McNees Attorneys and Colleague Recognized for Contributions to the Firm and Community

November 17, 2020 - McNees Announces New Management Committee Member and Diversity Committee Chair

August 24, 2020 - 34 McNees Attorneys Recognized by Best Lawyers®, Four Named “Lawyer of the Year”

August 15, 2019 - 33 McNees Attorneys Among 2020 Best Lawyers in America, 7 Named Lawyer of the Year

August 15, 2018 - 35 McNees Attorneys Among 2019 Best Lawyers in America

April 30, 2018 - McNees Attorney to Speak at Industrial Energy Consumers of America Meeting

February 12, 2018 - McNees Attorney Opening Keynote Speaker at Annual Ohio Conference

February 20, 2018 - McNees Attorneys, Specialists to present at Annual Ohio Conference

August 15, 2017 - 38 McNees Attorneys Selected as 2018 Best Lawyers in America

April 10, 2017 - McNees’ Robert Weishaar Elected President of the Energy Bar Association

October 26, 2016 - McNees attorneys to speak at Pennsylvania Energy Management Conference

August 15, 2016 - 37 McNees Attorneys Selected by 2017 Best Lawyers in America

April 22, 2016 - McNees Attorney Robert A. Weishaar, Jr. Named to 2016 DC Super Lawyers and Rising Stars

August 17, 2015 - 39 McNees Attorneys Selected by 2016 Best Lawyers in America 7 named 2016 “Lawyers of the Year’’