Thomas McGonigle represents governmental entities and private sector clients in commercial litigation and commercial transactions before regulatory authorities of state and local governments. In a career that spans more than two decades, Tom has distinguished himself as a go-to commercial litigator for administrative law matters and an attorney that the state of Delaware and other public entities trust to lead on high-profile initiatives. A former Delaware deputy attorney general and chief of staff to then-Delaware Governor Jack A. Markell, Tom’s experience in the highest levels of state government and law enforcement is an asset to clients facing administrative challenges and disputes.

Commercial Litigation

In private practice, Tom represents corporations and individuals in complex commercial litigation and regulatory matters. He has represented clients in significant matters before the Delaware Supreme Court, the Delaware Court of Chancery, the Delaware Superior Court and the Delaware Public Service Commission.

State Government Experience

As Governor Markell’s most senior advisor, Tom managed the administration, including day-to-day oversight of the senior staff and cabinet. He also served previously as chief legal counsel and policy director to former Delaware Governor (and now U.S. Senator) Thomas R. Carper. In that role, Tom supervised all legal operations for the governor's office, and as policy director, developed the governor's policy and legislative agenda. Additionally, Tom is a former deputy attorney general, in which capacity he primarily handled securities and consumer fraud cases.



Bar Admissions



Elizabethtown College
B.A. (1989)

The Dickinson School of Law of Pennsylvania State University
J.D. (1992)

Leadership & Community

Pro Bono

  • Court Modernization Review Committee
  • The Administrative Law Improvement Task Force – Co-Chairman

Professional Associations

  • Delaware State Bar Association — Executive Committee

Civic Activities

  • Delaware Stadium Corporation — Chairman

Firm Leadership

  • Office Leader, Wilmington
  • Drinker Biddle & Reath LLP — Regional Partner in Charge, Wilmington Office


  • Faegre Drinker — Pro Bono Honor Roll, 2020
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