vocationer
n.— «The 18-month-old firm lets people try out their dream jobs—selling test runs in about 60 occupations.…So far, of 100 clients—the company calls them “vocationers”—one has actually made the leap and struck out for a new career as a cheesemaker.…”You know—‘I’m a vocationer, she’s vocationing, we’re on vocation.’”» —“Test-Drive Your Fantasy Job” by Grainger David Fortune July 14, 2005. (source: Double-Tongued Dictionary)