Aside from gymnastics, Yim is an accomplished musician; she plays both flute and organ, and she was an organist at the Crystal Cathedral at age 14.

[2][3] In 1998, Yim began training at Charter Oak Gliders gymnastics club in Covina, California, and was coached by Beth Kline-Rybacki and Steve Rybacki.

Seen as a junior international elite to watch for her expressive dance and strong balance beam performances, Yim quickly progressed to become one of the top U.S. gymnasts during the 2001-2004 quadrennium.

In her first major senior competition, the 2001 U.S. National Championships, she won the silver medal in the all-around behind 2000 Olympic team member, Tasha Schwikert.

Out for most of 2002 with a series of lower body injuries, Yim returned to the 2002 U.S. National Championships after just two weeks of full training.

[2] She won the silver medal in the all-around for the second consecutive year behind Tasha Schwikert and was a leading candidate to represent the U.S. at the 2002 World Championships.

[4] Yim was named the head coach of the Stanford University women's gymnastics team in August 2017.