Matthew J. "Matt" Warren

David M. McCullough is a top attorney recognized by Best Lawyers in the practice area(s) of Energy Law. David M., 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 David M. is held by other top lawyers in the same geographic and legal practice area.

Robert C. Jones is a top attorney recognized by Best Lawyers in the practice area(s) of Government Relations Practice. Robert C., who practices law in Washington, District of Columbia, has been recognized since 2020. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Robert C. is held by other top lawyers in the same geographic and legal practice area.

A. Jeff Ifrah’s legal skills and record of success have earned him international recognition as a white-collar criminal defense lawyer and litigator. He is an advocate keenly focused on delivering results for his clients – on understanding the problems they face and developing innovative strategies to resolve them. Considered one of the world’s foremost attorneys in Online Gaming Law , Jeff is ranked in Chambers Global Gaming Guide and is the only attorney ranked in Band 1 n...

Scott Sergio is a top attorney recognized by Best Lawyers in the practice area(s) of Real Estate Law. Scott, who practices law in Washington, District of Columbia, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Scott is held by other top lawyers in the same geographic and legal practice area.

Jeffrey A. Kolender chairs the firm’s Estate Planning and Estate & Trust Administration practice groups. He concentrates primarily in those areas and also advises small businesses in tax business planning. A former chairman of the Estates and Trusts Section of the Montgomery County Bar Association, Mr. Kolender has participated as lecturer and co-author of outlines for several continuing legal education seminars regarding estate planning. His topics have included “Advising Cli...

Alexandra Walsh is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation. Alexandra, who practices law in Washington, District of Columbia, has been recognized since 2022. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Alexandra is held by other top lawyers in the same geographic and legal practice area.

David Brown is co-chair of the firm’s corporate practice area, which includes its corporate, energy, finance, health care, real estate and public policy groups, and a partner in the Financial Services & Products Group, which he previously led. His practice focuses on mergers and acquisitions, corporate governance, securities disclosure, and payment system and other technology transactions, with an emphasis on the financial services, technology and telecommunications industries. Davi...

For over twenty-five years, Wendy has represented a diverse range of energy clients including investor-owned utilities, independent generators, investors in transmission infrastructure and local gas distribution companies before the Federal Energy Regulatory Commission (FERC), the Department of Energy and federal courts. Her practice focuses on rate regulation, energy market rules and operation, open access transmission issues, administrative litigation, mergers and acquisitions, enforcement ...

My approach in my practice is one of empathy and support. I provide my clients with peace of mind as I help them plan for the future and guide them through difficult times. Creating an estate plan can be daunting, and it is tempting to put it off. I make the process as easy and stress-free as possible, and my clients leave feeling a sense of accomplishment and relief. My team and I also guide families through the handling of the estate after the death of a loved one. We understand how difficu...

Steven A. Sigsbury specializes in tax and estate planning, estate and trust administration, fiduciary responsibility, and business and real estate planning. Steven’s laid-back personality allows him to relate to clients and instill a sense of trustworthiness at the outset of any engagement. Steven analyzes and simplifies complex problems and offers clients individualized solutions. As a tax and estate planner, Steven works with clients to develop tax-efficient estate plans that accompli...