Hi.  Do you know about Lifeguards
I have never worked as one, but I know you have to be a really strong swimmer and know a lot about first aid.
Lifeguards are strong swimmers and trained in CPR/AED first aid, certified in water rescue using a variety of aids and equipment depending on requirements of their particular venue
Some lifeguards work within a venue like a pool or a lake or a section of beach, but others are part of a larger rescue organization for a region.
Yep.  To be a lifeguard, a trainee must be able to swim 300 yards or 12 laps and tread water for 2 minutes without using their hands.
Their job is made harder by the fact that swimmers don't get the proper information and training about avoiding drowning.