Guard Captain

The Top Dog
Greetings Captain! You are the highest ranking of the guards in town. In fact, you are in charge of all the guards in town. You make sure that the guards are not conducting illegal arrests, taking bribes or other such thing. In short, you're their boss. So keep them in line.

The other part of your job involves watching over the prisoners in jail. Make sure the wounded receive medical care from the town doctor and make sure your guards don't abuse the prisoners. In this sense, you're the warden.

Making wanted criminals known
This means putting up wanted posters and letting the town crier know to start screeching at everyone that there is a criminal on the loose. A guard could perform this duty, but it's much more credible when their boss does this.

Things to note
Unlike in regular SS13, you are a warden with the power of the Head of Security. You are expected to report to the Commander if the town is under attack from external forces. You still have power over the guards, but ultimately the commander gets the final say to any defense decision.

Just like a regular guard, remember you are to enforce the law, not be the law. Just because you are the jailer, does not mean you can torture the prisoners as you please.