Michael T. "Mike" Marr

Kevin A. Ewing is a lawyer recognized by Best Lawyers in the practice areas of Energy Law and Environmental Law. Kevin A. practices law in Washington, District of Columbia Best Lawyers has recognized Kevin A. Ewing since 2023. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Kevin A. Ewing is held by other lawyers.

Jamie Gorelick is widely regarded as one of the nation’s most distinguished lawyers. As Law.com recently wrote, “Think of some of the most defining moments in American history over the last five decades, from Watergate to the 9/11 attacks, and attorney Jamie Gorelick has often been there in the moment or aftermath, fact-finding or working to advance a client's interest. Think of some of the biggest disasters and crises, and the Brooklyn, New York native has been there, too, repres...

James V. Cole is a lawyer recognized by Best Lawyers in the practice area of Employee Benefits (ERISA) Law. James V. practices law in Washington, District of Columbia Best Lawyers has recognized James V. Cole since 2026. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which James V. Cole is held by other lawyers.

Leigh-Alexandra Basha focuses her practice on domestic and international estate and tax planning. She counsels an affluent international client base on a wide range of sophisticated matters, including estate and trust administration, family wealth preservation, tax compliance, as well as business succession, expatriation and pre-immigration planning. Leigh is head of the Firm’s Washington, DC, Private Client Practice Group. Please view more on Leigh-Alexandra's biography here: https://w...

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...

Owen Walker practices in the areas of commercial construction and government contracts law. He represents owners, developers, design professionals, contractors and subcontractors in all phases of construction projects, from contract preparation and negotiation through dispute resolution and litigation. Owen counsels regional, national and international clients on legal matters, including contract formation, administration and performance, claim entitlement and liability, contract termination ...

Sean A. Atkins is a lawyer recognized by Best Lawyers in the practice area of Energy Law. Sean A. practices law in Washington, District of Columbia Best Lawyers has recognized Sean A. Atkins since 2020. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Sean A. Atkins is held by other lawyers.

Lisa Campbell is co-chair of the firm’s Health Services Practice. She advises clients on all aspects of the Affordable Care Act (ACA), including the insurance market reforms, qualified health plan standards, exchange rules, consumer assistance programs for the federal marketplace, and ACA section 1557 nondiscrimination rules. Lisa also works with clients on the Federal Mental Health Parity and Addiction Equity Act (MHPAEA), state insurance law, and Medicare and Medicaid. She represents ...

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...

Doug Patin has an extensive government contracts practice. While this work has involved the entire spectrum of traditional government contract disputes, he has developed extensive experience in various aspects of government contract law including: federal fraud and False Claims Act issues, bid protests, mediation, and contract dispute litigation with the federal government. Doug's extensive teaching and writing efforts keep him current on changing case law and developments in the field. Doug ...