Hello aspirant,

You can either go for higher studies or go for jobs directly. I'll suggest you to go for higher studies. You can go for M.Sc, M.Phil, certificate courses, or PhDs. About the jobs, you can be any one of the following-

Lab Supervisor

Researcher

Technician

Teacher

Manager

Scientist

Consulting Physicist

Research Associate

Senior Physicist

Assistant Scientist

Radiation Oncologist

Radiologist

Professor.