Tom is a security guard at the airport. ✬

The security guard told Tom that he couldn't take pictures in this area. ✬

Tom is an unemployed security guard. ✬

Your security guard wouldn't let me in. ✬

Tom disguised himself as a security guard. ✬

Tom is working as a security guard. ✬

I used to have a job as a security guard at a bank. ✬

Tom got a job as a security guard. ✬

Tom works as a security guard. ✬

Tom is a security guard. ✬