Fame
Maybe you singlehandedly foil a major bank robbery. Or maybe you thwart a kidnapping attempt at a local mall. Or maybe all you manage is to stop a teenage girl from swiping a Coach purse. In any case, if any notoriety comes from your job, it will likely be from a combination of being in the right place at the right time, plus the right actions on your part to take care of it. Congratulations! Now, make sure you show up on time for tomorrow's shift.
If you're a security guard and fame is your goal, probably the best way to achieve it is to try to sell a TV producer on creating a reality television show centered on your life. If, for whatever reason, Mr. Big Shot TV Producer just doesn't have the necessary vision to appreciate the creative genius of your proposal, fool that he is, you can always wait for that one-in-a-million, news-worthy save or bust you make on the job, and then try to peddle it to a publisher for a book deal.
Hey, Miley Cyrus got a one a few years back (no joke—look it up!), so why not you?