Austin Mooney

Jonathan Phillips is a top attorney recognized by Best Lawyers in the practice area(s) of Health Care Law and Qui Tam Law. Jonathan, 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 Jonathan is held by other top lawyers in the same geographic and legal practice area.

For more information, please visit www.gibsondunn.com/lawyer/diamant-michael/ .

Gerald P. Konkel is a top attorney recognized by Best Lawyers in the practice area(s) of Insurance Law. Gerald P., 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 Gerald P. is held by other top lawyers in the same geographic and legal practice area.

Mark’s background includes a broad array of multijurisdictional and complex commercial disputes, including class action litigation. He has practiced before state and federal courts, as well as in arbitration actions, and he has been involved in all aspects of litigation—from pretrial discovery and motion practice to trial advocacy and appellate practice. He regularly represents plans, their sponsors, and insurance companies before federal and state regulatory agencies. As a litiga...

Solomon L. Wisenberg is a top attorney recognized by Best Lawyers in the practice area(s) of Criminal Defense: White-Collar. Solomon L., who practices law in Washington, District of Columbia, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Solomon L. is held by other top lawyers in the same geographic and legal practice area.

Joyce advises clients on regulatory, legislative, and compliance issues. Clinical laboratories and a wide range of other health care entities rely on her comprehensive understanding of health care law and on her advocacy and public policy experience to navigate through various policy issues. Joyce draws on her experience of more than a decade as a public policy advocate and campaign professional. She worked for Democratic candidates campaigning for President, governor, U.S. Senate, and U.S. H...

Marc R. Engel is a top attorney recognized by Best Lawyers in the practice area(s) of Employment Law - Management and Litigation - Labor and Employment. Marc R., who practices law in Bethesda, Maryland, has been recognized since 2018. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Marc R. is held by other top lawyers in the same geographic and legal practice area.

Jennifer Eller is co-chair of Groom’s Retirement Services Practice Group and Fiduciary Practice. She’s been with the firm since 1998, beginning as a law clerk, and has been a practicing attorney at Groom since 2000. As a practice group chair, Jenny ensures that the strategic direction and initiatives of the group position Groom to serve the needs of its financial, corporate, and public plan clients. In her practice, she operates from a similar perspective. She advises financial in...

Patrick S. Menasco is a top attorney recognized by Best Lawyers in the practice area(s) of Employee Benefits (ERISA) Law. Patrick S., 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 Patrick S. is held by other top lawyers in the same geographic and legal practice area.

Shelley R. Slade is a top attorney recognized by Best Lawyers in the practice area(s) of Qui Tam Law. Shelley R., 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 Shelley R. is held by other top lawyers in the same geographic and legal practice area.