She started in the entertainment industry as a costumer and later a costume supervisor in Roseanne from 1990 to 1997.
Quigley has been a costume designer for both Two and a Half Men and The Big Bang Theory since 2003 and 2007 respectively. Both shows were co-created by Chuck Lorre. She also works as a co-producer for both shows.
She appears in the behind-the-scenes special "The Big Bang Theory: Access All Areas" (2012) and shows the presenter Rick Edwards the wardrobe of the characters in the series. She also appeared in a feaurette with Simon Helberg about Howard's wardrobe entitled "The Big Bang Theory: Set Tour with Simon & Kunal" .
- Mary T. Quigley at IMDb