Jennifer Sey (born February 23, 1969) is an American writer, business executive and former artistic gymnast.
She began competing in gymnastics at the age of six and went on to become a seven-time member of the United States national team. At the 1985 World Artistic Gymnastics Championships, she suffered a broken leg after missing a release move on the uneven bars. As a result, rules were changed to allow coaches to spot their gymnasts during release moves. After recovering, she became the 1986 national champion. However, after a string of ankle injuries and struggles with bulimia, she retired from the sport without trying for the 1988 Olympics.
Sey graduated from Stanford University and joined Levi Strauss & Co. as a marketer in 1999. She was named one of the "Top 40 Marketers Under 40" by Advertising Age in 2006 for her work at Levi Strauss. In 2013, she became the company's global chief marketing officer.
In 2008, she published Chalked Up: Inside Elite Gymnastics' Merciless Coaching, Overzealous Parents, Eating Disorders, and Elusive Olympic Dreams. The book details her career as an elite gymnast, including her experience at the Parkettes National Gymnastics Training Center in Allentown, Pennsylvania. She has also written and produced two short films.
She lives in San Francisco with her two sons from a previous marriage, and gave birth to a baby with her boyfriend in 2014.