As the United States Deputy Secretary of Labor, Sonderling is the second-highest-ranking official and serves as the Department's Chief Operating Officer, overseeing the agency’s $14 billion dollar budget and 16,000 employees. The Deputy Secretary oversees key operational functions such as: strategic planning; budget formulation; financial management; information technology; and human resource management. Additionally, the Deputy Secretary provides the leadership and management of DOL’s agencies necessary to support the Secretary and the Department’s mission.

Prior to becoming Deputy Secretary, he was previously confirmed by the United States Senate to serve as the Commissioner of the U.S. Equal Employment Opportunity Commission (EEOC) from September 2020 until August 2024. He also served as the Commission’s Vice-Chair from 2020-2021.

Before his government service, Sonderling was a partner at one of Florida’s oldest and largest law firms, Gunster. At Gunster, he counseled employers and litigated labor and employment disputes. In 2012, then-Governor Rick Scott appointed Sonderling to serve as the Chair of the Judicial Nominating Committee for appellate courts in South Florida. Sonderling was also active in the community, serving on the Board of Directors for Morse Life Health System, the Boca Raton Chamber of Commerce, and Leadership Florida.

Sonderling also serves as a Professional Lecturer in the Law (Adjunct Professor) at George Washington University Law School, teaching employment discrimination.

Sonderling received his B.S., magna cum laude, from the University of Florida and his J.D., magna cum laude, from Nova Southeastern University.