Kenneth "Ken" Klein

Experienced liaison between Indian tribes and businesses. Problem-solver for complex legislative, regulatory and legal issues. Former attorney for the Department of the Interior and the Department of Justice. Sarah Murray provides counsel on laws, regulations and legislation related to administrative law, regulatory compliance, land use, Indian affairs and tribal gaming. Her experience serving as an attorney at multiple federal agencies and rich knowledge of the historical, legal and constitu...

Stephanie S. Lim represents independent power producers, power marketers, trade associations, and others in a wide variety of regulatory matters before the Federal Energy Regulatory Commission (FERC), courts of appeal and state public utility commissions. She counsels clients on the structure of electricity markets and the design of capacity markets. Stephanie also represents private equity clients and power producers on transactional matters, including mergers and acquisitions. Read full bio...

Recognized as one of The Best Lawyers in America © in the fields of commercial litigation and intellectual property, Susan Metcalfe is a veteran trial attorney who knows what it takes to get the job done for her clients both inside and outside the courtroom. With over eighteen years’ experience as a trial attorney, Susan has significant, substantive experience with an extremely broad array of litigation, including: Intellectual property (trade secrets, trademark, noncompetition agr...

Avi Kumin is a founder and partner at Katz Banks Kumin. For over 20 years, Mr. Kumin has been successfully advising employees about their legal rights, resolving difficult situations with employers, and litigating employment claims in court. Mr. Kumin’s practice focuses on whistleblower protection, sexual harassment and assault, executive negotiations, contractual disputes, discrimination, and retaliation, among other areas of employment law, often in highly complex and contentious situ...

Constantine G. Papavizas is a top attorney recognized by Best Lawyers in the practice area(s) of Admiralty and Maritime Law. Constantine G., who practices law in Washington, District of Columbia, has been recognized since 2008. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Constantine G. is held by other top lawyers in the same geographic and legal practice area.

Ronald Machen, a member of the firm's global Management Committee and Chair of the Firm’s Litigation and Controversy Department is one of the nation's leading trial and white-collar defense lawyers. His practice focuses on government enforcement, corporate and congressional investigations, and litigating civil business disputes. An experienced litigator who has tried more than 35 cases to verdict, Mr. Machen specializes in litigating complex criminal and civil actions. He also routinely...

Elizabeth Soc is a top attorney recognized by Best Lawyers in the practice area(s) of Trusts and Estates. Elizabeth, who practices law in Alexandria, Virginia, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Elizabeth is held by other top lawyers in the same geographic and legal practice area.

Joanna Kerpen is a top attorney recognized by Best Lawyers in the practice area(s) of Employee Benefits (ERISA) Law. Joanna, who practices law in Washington, District of Columbia, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Joanna is held by other top lawyers in the same geographic and legal practice area.

Alexander H. Xanttopoulos is a principal attorney with Roop, Xanttopoulos, Babounakis. He joined the predecessor firm in Fall 2010, to focus primarily on family law. He works in cases involving divorce, child custody, support, visitation and equitable distribution. Prior to joining Roop Law, Alex worked for several years for Greenspun, Shapiro, Davis and Leary P.C. as an associate practicing in the areas of domestic relations, traffic, criminal defense and civil litigation. He also has experi...

Christopher S. Rizek is a Member in Caplin & Drysdale's Washington, D.C., office. He also serves as General Counsel to the firm. In 2014, he was listed in the elite "Leading Lawyer" list for Tax Controversy by The Legal 500 . Services Mr. Rizek represents taxpayers in all types of federal civil and criminal tax controversy matters. He also guides clients through IRS audits, prepares administrative claims and protests of IRS actions, and litigates tax and tax-related cases in U.S. district...