Heather Sisto Koontz

Leon B. Greenfield has an exceptionally wide breadth of experience representing clients in complex antitrust-related matters. He has represented clients in cutting edge Section 2 litigation and agency matters. He has secured antitrust clearance for major acquisitions, litigated cases in federal and state court and counseled clients on many types of antitrust issues. Mr. Greenfield also has broad experience in matters outside the antitrust area, including securities regulatory matters and liti...

After a long and distinguished career in the federal government with the Equal Employment Opportunity Commission, Ms. Wheeler joined Katz Banks Kumin in August 2015. As an appellate lawyer with the EEOC, Ms. Wheeler was in the forefront of developing cutting edge legal arguments and theories to prove discrimination and harassment under Title VII, The Age Discrimination in Employment Act, the Americans with Disabilities Act, and the Equal Pay Act. Ms. Wheeler was an Assistant General Counsel i...

Jan Baran is a top attorney recognized by Best Lawyers in the practice area(s) of Government Relations Practice. Jan, 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 Jan is held by other top lawyers in the same geographic and legal practice area.

Matt Perushek has practiced personal injury law his entire career. He exclusively represents plaintiffs, those who were injured because of the negligence of others. He has represented clients in wrongful death, medical malpractice, brain injury, products liability, and serious automobile collision cases. Matt has tried cases in courts throughout Virginia, including Fairfax, Arlington, Prince William, Loudoun, Henrico, and Fredericksburg. Matt also has experience representing clients in federa...

Ms. Harden has 20 years of civil litigation experience in the Commonwealth of Virginia. She has litigated diverse and varied topics throughout her career including eminent domain, breach of contract, medical malpractice, construction defect, partition, establishment of prescriptive easement, professional liability, covenant enforcement, and actions to quiet title. In recent years, Ms. Harden’s practice has focused on representing condemning authorities in eminent domain matters. Ms. Har...

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...

Michael D. Hausfeld is a top attorney recognized by Best Lawyers in the practice area(s) of Antitrust Law and Litigation - Antitrust. Michael D., who practices law in Washington, District of Columbia, has been recognized since 2006. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Michael D. is held by other top lawyers in the same geographic and legal practice area.

For more information, please visit www.gibsondunn.com/lawyer/debold-david/ .

Matthew Martens is a Fellow of the American College of Trial Lawyers who represents clients in their toughest civil and criminal investigations and litigation. He is one of the few lawyers who has appeared—and won—at trial at “all four tables”: civil plaintiff, civil defendant, criminal prosecution, and criminal defendant. In all, he has tried 26 cases ranging from securities fraud to patent infringement to consumer fraud to murder to employment law to money laundering...

Michael K. Isenman is a top attorney recognized by Best Lawyers in the practice area(s) of Mutual Funds Law. Michael K., 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 Michael K. is held by other top lawyers in the same geographic and legal practice area.