After graduation from law school, Morrison served as a law clerk to Judge John David Holschuh of the United States District Court for the Southern District of Ohio. Before entering state service, she was a partner in the Columbus, Ohio office of Taft Stettinius & Hollister, where she practiced complex civil and commercial litigation. Prior to her appointment as Administrator, she served for four years as the General Counsel and Chief Ethics Officer of the Ohio Bureau of Workers' Compensation. From 2016 to 2019 she served as the Administrator and Chief Executive Officer of the Ohio Bureau of Workers' Compensation, where she oversaw the investment of $25 billion and an agency staff of 1,800.[2]
On January 3, 2019, her nomination was returned to the president under Rule XXXI, Paragraph 6 of the Senate. On January 23, 2019, President Trump announced his intent to renominate Morrison for a federal judgeship.[6] Her nomination was sent to the Senate later that day.[7] On February 7, 2019, her nomination was reported out of committee by a voice vote.[8] On June 10, 2019, the Senate invoked cloture on her nomination by a 89–7 vote.[9] On June 11, 2019, her nomination was confirmed by a 89–7 vote.[10] She received her judicial commission on June 14, 2019.[11] She became the chief judge on September 7, 2024.[12]