In March 2022, Walker was one of two candidates recommended to the president by U.S. Senators Mark Warner and Tim Kaine.[7] On July 13, 2022, President Joe Biden nominated Walker to serve as a United States district judge of the United States District Court for the Eastern District of Virginia.[5] President Biden nominated Walker to the seat vacated by Judge Raymond Alvin Jackson, who assumed senior status on November 23, 2021.[8] On September 21, 2022, a hearing on his nomination was held before the Senate Judiciary Committee.[9] On December 1, 2022, his nomination was reported out of committee by a 15–7 vote.[10] On January 3, 2023, his nomination was returned to the President under Rule XXXI, Paragraph 6 of the United States Senate; he was renominated later the same day.[11] On February 2, 2023, his nomination was reported out of committee by a 14–6 vote.[12] On February 27, 2023, the Senate invoked cloture on his nomination by a 52–39 vote.[13] On February 28, 2023, his nomination was confirmed by a 52–41 vote.[14] He received his judicial commission on March 3, 2023.[15] He was sworn in on March 6, 2023.[16] Walker is the first openly LGBTQArticle III judge to serve in Virginia.[17]