Qualifications
There aren't many qualifications a serious would-be greenskeeper must meet before landing a professional job at a golf course. The only things required will be of the non-degree sort: able to take orders; able to work with lawn care equipment; able to perform repetitive, often menial tasks without going crazy.
Greenskeepers who want to make just a tiny bit more money can become state certified in applying pesticides, which will allow them to do it professionally. Other nice-to-have qualities include being a strong communicator, being able to work well with a team, and owning a really nice pair of sunglasses.