She has provided the company with many years of 'loyal' service.
She has remained/stayed 'loyal to' her old friends.
has served 'loyally' for many years
(..) The Potato Heads. Mr. and Mrs. You gotta keep 'em together, 'cause they're madly in love. Now Slinky here is as loyal as any dog you could want. And Hamm, he'll keep your money safe, but he's also one of the most dastardly villains of all time, evil Dr. Pork Chop. These little dudes (..)2010 Toy Story 3