I would like to work as a lifeguard
lifeguard is a rescuer who supervises the safety and rescue of swimmers, surfers, and other water sports participants such as in a swimming pool, water park,
Wow ,that's a noble profession
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 
When was the history of lifeguard?
Well, the history is yet unknown, but they It consists of lack of education about water safety or local conditions, a lack of safety advice