Fran Gilmartin has worked for Roche in Nutley for 11 years, and she was among the employees who were shocked when they were told in June that the 83-year-old facility was going to be shut down. “I definitely would have liked to have retired here,” said Gilmartin, a senior executive assistant who lives in Wayne. Gilmartin is one of the roughly 500 Roche employees, of the 1,000 that are being laid off, who have already gone through orientation at the pharmaceutical giant’s new career-transition center. The Transition and Learning Center (TLC) debuted with an open house held several days last week, but Roche officially announced its existence Tuesday.