I interviewed at A-Beautiful Pools (Sugar Land, TX)
Interview
You'd first apply online, then go through a short interview focused on personality and previous experience. Then you would have to go through a lifeguard training course, which can cost 50-100$ depending on how early you do it, and then you get placed into a pool near you after training.
Very straightforward and easy. All they really ask of you is where you would like to work. The actual training is what determines whether you get the job or not.
I applied online. I interviewed at A-Beautiful Pools
Interview
It was a very informal interview. Just one on one with a supervisor. If you just try and show that you care they will hire you. It was about 10 mins long.