Lili R. O'Connell

Julia is one of the four founding partners of Rock Creek Energy Group. Julia has focused her practice primarily on hydroelectric and electric power matters since 2003. She provides strategic counsel to a broad variety of electric industry participants, including independent power producers, power marketers, investor-owned utilities, and state and municipal entities. She advises clients on issues involving the Federal Power Act (FPA), National Environmental Policy Act, Endangered Species Act, ...

Jennifer P. Hughes is a top attorney recognized by Best Lawyers in the practice area(s) of Gaming Law and Native American Law. Jennifer P., who practices law in Washington, District of Columbia, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Jennifer P. is held by other top lawyers in the same geographic and legal practice area.

Steve Roberts is a top attorney recognized by Best Lawyers in the practice area(s) of Government Relations Practice. Steve, who practices law in Washington, District of Columbia, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Steve is held by other top lawyers in the same geographic and legal practice area.

Jonathan G. Hardin is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Insurance. Jonathan G., who practices law in Washington, District of Columbia, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Jonathan G. is held by other top lawyers in the same geographic and legal practice area.

Louis Mazawey brings decades of experience as an authority on the tax aspects of employee benefits in all forms to his work at Groom. As counsel to major insurance companies and a variety of plan sponsors—including corporate employers, trade associations, and public retirement systems—Lou has worked closely with qualified plans, 403(b) and 457 plans, IRAs, employee stock ownership plans, executive compensation, retiree medical benefits, plan terminations, mergers and spinoffs, the...

Margaret is one of the four founding partners of Rock Creek Energy Group. She has over 18 years of experience counseling and representing a broad swath of electric industry participants on a wide range of federal energy regulatory and administrative litigation matters. She provides strategic counsel to investor-owned utilities, renewable and conventional generators, private equity and institutional investors, developers, and renewable energy providers on transactional, regulatory, and litigat...

Anita M. Mosner is a top attorney recognized by Best Lawyers in the practice area(s) of Aviation Law. Anita M., who practices law in Washington, District of Columbia, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Anita M. is held by other top lawyers in the same geographic and legal practice area.

Barry Fleishman focuses his practice on complex policyholder insurance coverage and products liability issues. He has experience in complex litigation before federal and state courts, arbitral tribunals, and judicial and private mediators, with primary focus on representing corporate policyholders seeking to secure insurance coverage for liability and loss arising out property damage, bodily injury, personal injury, and alleged wrongful acts of directors and officers. Mr. Fleishman has repres...

Lance Brasher is the head of the firm’s North American Energy and Infrastructure Projects Group. He has served for more than 20 years as lead lawyer in complex acquisition, financing and development transactions involving energy and infrastructure facilities in the United States and around the world. Mr. Brasher has advised diversified energy companies, utilities, private investment firms and financial institutions in all phases of solar, wind and other renewable energy projects; gas an...

Frederick (Rick) Stearns provides his clients with experience on a wide range of issues affecting makers of prescription and over-the-counter (OTC) drugs, medical devices, dietary supplements, cosmetics, food, and food ingredients. He is also deeply involved with the regulatory issues surrounding cannabis and hemp-based products, including cannabidiol (CBD) and related cannabinoids. Rick helps manufacturers evaluate the need for marketing approval from the U.S. Food and Drug Administration (F...