根据以下材料，回答题
Ron was an engineer.He planned a change and tried the new job of teaching kids how to swim.Ron' s easy manner soon made him a full-time employee at the swim school.
Now, the 40 hours he works a week takes in weekends, early mornings and late afternoons.Heearns around 25% less than he did in engineering.But, at 49, he says he has never been happier."I' ve had a drop in pay, but I' ve cut back on spending, too.I seldom drive to work so don' t have topay as much for petrol (汽油).I don' t drink as much.I go walking in my lunch break and I' ve lost20 kilos.I love going to work.The whole family is a lot happier."
When one of his brothers called, offering to help him find "a real job", he answered, "I don' t care.Iknow what I'm doing is good."
 He admits it was fearful making such a big change when there was the mortgage (分期付款) to payand kids to clothe and feed, but in the end he feels it is a simple choice."If you' re in a job you don' tlike, get out.Money' s not everything.If you don' t like it, change--find something you' re going to behappy with."
What is Ron' s new job like?