Chelsea Keefer - Tulsa Ballet, Oklahoma, US. (Photograph by Richard Calmes) - Tulsa Ballet corps member Keefer launched her professional career in 2011 thanks to YAGP. “I’d done YAGP before, mostly to gain experience, but last year I took it very seriously as a job opportunity,” Keefer says. “I worked on cleaning my class technique in addition to my competition variations.” After a YAGP-hosted audition class in New York City where artistic directors lined the walls, she was offered a contract for Tulsa Ballet’s second company…