She performed in adult films between 1988 and 1999, and also directed several movies in the early 1990s. In 1997 Paul Norman released a private home video of himself and Welles, filmed after their divorce, called The Private Diary of Tori Welles. Welles was reportedly angry but said she had no legal basis to stop its distribution.
Welles is a former contract performer with Vivid Entertainment, and as of 2004 she worked as a regional sales manager for Peach DVD, under the name Brittania Paris.
In May 2011, Welles was hired as a sales associate by Metro Entertainment.
In March 2012, Welles and Tom Byron launched Hall of Fame Management, a talent agency that represents pornographic actors, directors, editors, photographers, and other adult industry workers.