"To begin a career" means to start working in a specific profession or job, usually with a long-term goal of growth and advancement in that field. Full definition
This problem affects young people just beginning careers as well as older people who have never used credit. (mortgage-x.com)
Are you interested in beginning a career in the health care industry while working alongside major health care providers like doctors, physician's assistants, and nurse practitioners? (medicalassistantschools.com)
Consequently, it's also true that teachers who begin their careers at later ages are comparatively better off than teachers who began at younger ages. (educationnext.org)