Can a teacher become a career counselor?

Absolutely.
Teachers are the perfect and most likely candidates to become a career counselor.

There is nothing specific qualifications for becoming career counselor as such. However, successful career counselors are with below qualifications,

1. Academic background – Psychology, Teaching, Engineering, Medicine, HR, Social Science, etc.,
2. Experience – Wide range of background experiences such as Teaching and Training, Psychological counseling, Human resource management, Doctors, Engineers, etc.,
3. Certification – Relevant certification in career counseling methodologies and procedure.
4. Practice – Adequate exposure to career counseling process and solutions.

Careers best of luck and hard work always shines bright! Happy Selecting!