Jen Sincero is an American writer and success coach.Sincero worked as a marketing executive in the music industry in the 1990s. She and her co-worker Sara Rotman decided to write a screenplay on a fictional band, which Sincero later formed in real life with her brother. The band later split up and she moved to Albuquerque, New Mexico in 1996 where she started the Jenny Clinkscales Band and later 60 Foot Queenie, a solo project. She moved to Los Angeles, California at the age of 35 after the Jenny Clinkscales Band disbanded.Sincero began freelance writing and was offered a book deal for her first book, Don't Sleep With Your Drummer. She became a success coach in 2008 and wrote the book You Are A Badass in 2013.