Kent served in the single-judge Galveston Division covering Brazoria, Chambers, Galveston, and Matagorda Counties. A member of the Republican Party, he was nominated by President George H. W. Bush on August 3, 1990, to a seat vacated by Hugh Gibson, confirmed by the United States Senate on September 28, 1990, and received his commission on October 1, 1990. His tenure as a United States District Court judge was marred from 2001 on by a series of disciplinary actions, culminating in his impeachment and resignation in 2009.