Donna Byrne

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.

Matt Hjortsberg is skilled at assisting clients in managing complex problems from “black swan events” to complex legal issues and multi-party negotiations. He has extensive experience representing commercial contractors, subcontractors, design professionals and owners in disputes, including construction delay, impact and defect claims. Regardless of the nature of the dispute, Matt brings the same core skills to each matter to help clients mitigate and manage risk. An unusually qui...

Erika Harmon Arner is a nationally recognized leader in trial practice before the Patent Trial and Appeal Board (PTAB) and related appeals to the U.S. Court of Appeals for the Federal Circuit. She consistently ranks as one of the top three female attorneys appearing in PTAB trials and was named a PTAB Litigator of the Year by Managing Intellectual Property. She has argued and won a number of landmark cases at the PTAB and Federal Circuit for both patent challengers and patent owners. Erika&rs...

Daniel P. Lyon is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation. Daniel P., who practices law in Leesburg, Virginia, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Daniel P. is held by other top lawyers in the same geographic and legal practice area.

William McConagha is a top attorney recognized by Best Lawyers in the practice area(s) of FDA Law. William, who practices law in Washington, District of Columbia, has been recognized since 2014. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which William is held by other top lawyers in the same geographic and legal practice area.

Janis B. Schiff has extensive experience representing property owners, asset managers and investors in connection with the development, redevelopment, sale, acquisition and leasing of retail, residential, condominium, office, mixed-use and hotel properties and venues, and represents clients in all facets of commercial real estate, including foreign investment in the United States, public-private partnerships, government leasing, financial workouts and restructurings, acquisition and sales con...

Thomas A. Cawley, Jr. is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Intellectual Property. Thomas A., who practices law in Washington, District of Columbia, has been recognized since 2016. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Thomas A. is held by other top lawyers in the same geographic and legal practice area.

Peter Everett is a trial lawyer who devotes his practice to representing persons injured by the reckless or careless acts of others. His practice includes four broad areas. First, Mr. Everett represents victims of violent crimes in child care center, employee assault and inadequate security cases against child care centers, private schools, shopping malls, hotels, apartment buildings and other commercial properties. He has testified before Congress on legislation designed to regulate the secu...

Debra D. Roby is an accomplished attorney at Washington Energy Law LLP, located in Washington, District of Columbia. With over two decades of experience, she represents a diverse range of stakeholders in the electric industry. She frequently appears before the Federal Energy Regulatory Commission (FERC) on matters such as transmission and energy market tariff and rate filings, merger proceedings, rulemakings, and hydroelectric licensing and compliance. Beyond her work with FERC, she provides ...

Lynn L. Bergeson, Managing Partner of Bergeson & Campbell, P.C. (B&C®), has earned an international reputation for her deep and expansive understanding of the Toxic Substances Control Act (TSCA), the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA), the European Union Registration, Evaluation, Authorization and Restriction of Chemicals (REACH) regulation, and especially how these regulatory programs pertain to nanotechnology, industrial biotechnology, synthetic biology,...