Mariah Leffingwell

Andrew B. Kolesar III is a top attorney recognized by Best Lawyers in the practice area(s) of Railroad Law and Transportation Law. Andrew B., who practices law in Washington, District of Columbia, has been recognized since 2019. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Andrew B. is held by other top lawyers in the same geographic and legal practice area.

Ed Donovan is a partner in Kirkland’s Washington, D.C., office where he focuses on intellectual property and technology-related litigation. His experience includes trials, arbitrations and preliminary injunction proceedings in federal and state courts and before the International Trade Commission. Ed has substantial experience in patent infringement litigation in district courts across the United States. As lead counsel, he has tried patent infringement cases to verdict in bench and jur...

Through his actions and collective experience, Haydn Richards has demonstrated that he is one of the foremost leaders in state financial services law and financial services licensing matters. Haydn is a nationally recognized leader on mortgage and financial services licensing matters, including counseling clients relating to the formation of financial services companies and strategic acquisitions. He regularly interacts on behalf of financial services companies with federal and state regulato...

Nicholas Woodfield is a principal at The Employment Law Group® law firm and is the firm’s general counsel. He is a seasoned trial attorney specializing in civil litigation and appellate advocacy and focuses his practice on whistleblower claims, wage non-payment and misclassification claims under the Fair Labor Standards Act (FLSA), discrimination and retaliation cases, and qui tam actions. Washingtonian Magazine has named him to its “Top Lawyers” list for his representat...

Mark L. Stember is a top attorney recognized by Best Lawyers in the practice area(s) of Employee Benefits (ERISA) Law and Litigation - ERISA. Mark L., who practices law in Washington, District of Columbia, has been recognized since 2010. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Mark L. is held by other top lawyers in the same geographic and legal practice area.

Mr. McGonigle focuses his practice on securities and investment regulation. His clients include broker/dealers, investment advisers, public companies, banks and individuals. He has experience in matters involving equity, fixed income, and derivative trading; broker/dealer and investment adviser compliance system design and review; fiduciary investment issues; regulatory registration issues; transactional disclosure issues; regulatory enforcement and grand jury representation; and litigation i...

Cliff Gross is a top attorney recognized by Best Lawyers in the practice area(s) of Tax Law. Cliff, 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 Cliff is held by other top lawyers in the same geographic and legal practice area.

Christine Dunn is a top attorney recognized by Best Lawyers in the practice area(s) of Employment Law - Individuals and Litigation - Labor and Employment. Christine, 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 Christine is held by other top lawyers in the same geographic and legal practice area.

David F. Klein is a top attorney recognized by Best Lawyers in the practice area(s) of Insurance Law. David F., who practices law in Washington, District of Columbia, has been recognized since 2018. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which David F. is held by other top lawyers in the same geographic and legal practice area.

Greg Luce handles civil and criminal litigation and regulatory matters involving the health care industry. He has represented health systems, pharmaceutical and medical device manufacturers, and other health care providers in litigation involving fraud and abuse enforcement, False Claims Act defense, and Medicare and Medicaid reimbursement. Mr. Luce focuses on the counseling and defense of health care providers, suppliers, pharmaceutical companies and physicians under state and federal fraud ...