Tom has been a prison guard for ten years. - Tom on yıldır bir hapishane gardiyanıdır.
You were a prison guard for ten years. - Sen on yıldır bir hapishane gardiyanıydın.
A correction officer, correction official, corrections officer, corrections official, prison officer, detention officer, prison guard or prison warder is a person charged with the responsibility of the supervision, safety and security of prisoners in a prison or jail