Rosamond's new postmaster, Sarah Stiles, is being sworn in at a ceremony 11 a.m. Wednesday in the Rosamond Post Office. 

Stiles began her postal career 16 years ago as a carrier in Simi Valley. Since then, she has worn multiple hats in the U.S. Postal Service, working in customer relations, marketing, sales and her most recent role, customer service supervisor, according to a USPS news release.