My husband used to be a lifeguard.  He had to be a strong swimmer, trained in CPR and first aid and certified in water rescue.  Have you ever needed a lifeguard/
I have not. I am a decent swimmer.
I feel much safer when there is one around!  I like that they supervise the safety of the swimmers, surfers and other water sports in pools, on a beach, etc.
That is a good perk. Does it take a lot of training?
A fair amount.  In some areas they are part of the EMS system and some of them even carry out mountain rescues.