Yes, you can absolutely work as both a mechanic and an MOT Tester, but remember, the roles are different. As an MOT Tester, your job is to inspect and certify a vehicle’s roadworthiness – you’ll be responsible for spotting issues, not fixing them. Mechanics, on the other hand, are responsible for diagnosing and repairing any faults a vehicle may have.  
 
If you’re currently a mechanic, adding MOT Testing to your skill set could make you more versatile and valuable in your testing station.