Myerscough served as a law clerk for Judge Harold Baker of the United States District Court for the Central District of Illinois and was in private practice in Springfield, Illinois from 1981 until her appointment as associate judge in 1987. Myerscough served as an associate judge until her election to the Illinois Circuit Courts in 1990, and in 1994 became Chief Judge of the Illinois Seventh Judicial Circuit and presiding judge of Sangamon County. She was elected to the Fourth District Appellate Court in 1998.[1] She replaced Judge Frederick Green of Urbana who retired.[2]
Renomination to federal district court under Obama
In February 2010, Senator Dick Durbin recommended Myerscough to President Obama for a seat on the district court. On June 17, 2010, President Obama renominated Myerscough to a federal district judgeship on the United States District Court for the Central District of Illinois. Myerscough was nominated to fill the vacancy created by Judge Joe Billy McDade, who assumed senior status on February 28, 2010.[4][1] On July 14, 2010, Obama withdrew Myerscough's name to fill the McDade vacancy and instead renominated Myerscough to fill the vacancy being created by Judge Jeanne E. Scott, who retired on August 1, 2010.[5] Myerscough's nomination was reported out of committee on February 17, 2011, by a voice vote.[6] On March 7, 2011, the Senate confirmed her nomination by a voice vote.[7] She received her commission on March 14, 2011. She assumed senior status on March 9, 2023.[1]