[3] Shadid earned a Bachelor of Science from Bradley University in 1979 and his Juris Doctor from University of Illinois Chicago School of Law, then known as the John Marshall Law School, in 1983.

[4][5] Shadid was in private practice from 1983 to 2001, additionally acting as part-time public defender in Peoria County from 1986 to 2001 and a commissioner of the Illinois Court of Claims from 1996 to 2001.

[4] In December 2001, Shadid was appointed to the Tenth Judicial Circuit of Illinois.

[5][7] On May 27, 2010, President Barack Obama nominated Shadid to replace Michael Mihm on the United States District Court for the Central District of Illinois.

[5] Shadid served as the chief judge of the Central District from March 12, 2012, to March 12, 2019;[5] he was sworn in by his predecessor Judge Michael P.