He has been a faculty member of two schools: The Goodman School of Drama at Depaul University and Columbia College in Chicago.
He currently resides in Los Angeles, California.
After graduation, he joined the prestigious Steppenwolf Theatre Company of Chicago. The renowned ensemble of artists - among them Laurie Metcalf, John Malkovich, Gary Sinise and Joan Allen - still work together as often as possible.
Graham Chase, Irwin's character on "My So-Called Life" (1994), was ranked #49 in TV Guide's list of the "50 Greatest TV Dads of All Time" [20 June 2004 issue].
Tom Irwin attended Illinois State University.
In 1999 appeared with Madonna on stage in London,in a David Williamson´s play "Up for Grabs"
He is an ensemble member of the Steppenwolf Theatre Company.