Keong was born in Vietnam and he and his family emigrated to Chicago where they lived in a Catholic Church. He attended The University of Chicago and discovered improv after a failed relationship, falling in love with performing improv and theater. Keong has studied and worked extensively in New York City and regionally. He received his  SAG card with the line: "In the butt?" in "Marci X", starring Lisa Kudrow and Damon Wayans. Keong currently resides in Los Angeles. 

Keong finished filming for Breaking News In Yuba County starring Allison Janney, playing the father to Awkwafina. He also finished filming for Ron Howard's adaptation of Hillbilly Elegy, where Keong will play a husband to Amy Adams character; also starring Glenn Close. Look for him in an upcoming episode of Better Call Saul.

Looking forward to starting Season 2 of Netflix's DEAD TO ME as Pastor Wayne, starring Christina Applegate and Linda Cardellini.