[2][4] Foust practiced law in Columbia City for five years, before moving to Indianapolis.
[2][4] In 1941, Foust became an associate professor at the Drake University School of Law in Des Moines, Iowa.
In 1947, Emmert resigned as Attorney General after being elected to serve on the Indiana Supreme Court.
Governor Ralph F. Gates appointed Foust to the office of Attorney General in 1947 to serve out the rest of Emmert's term.
[4][5] After serving as Attorney General, Foust continued to teach at the Indiana University School of Law – Indianapolis.