How Santa Got His Job by Stephen Krensky (2002)
Have you ever wondered what Santa did before he was Santa? When Santa was young and needed a job, no one was looking for a man in a red suit to deliver gifts on Christmas. So Santa tried just about everything -- from a chimney sweep to a postman to a circus performer. But none of these worked out. It wasn't until he met a group of elves who helped him use all his special talents, that Santa was able to find his dream job.