I stand by what I said. All companies hiring guards for water parks (Disney, Universal, Great Wolf, etc.) will ALWAYS look to hire guards with previous experience. The requirements to work in a water park require skills over and above the basic skill level to pass the American Red Cross lifeguarding class - which is the most common class in the country. Like every lifeguarding job I have had, there is an evaluation/test. I mistakenly lumped the Ellis certification which Disney requires into part of their evaluation testing - my bad. Not everyone who passes the Red Cross test will be able to pass the Ellis test or be able to pass the skill evaluation needed to work in a water park. As far as being cost effective, it was implied here (my someone other than yourself) that Disney could take a random college program person, teach them to swim, certify them and throw them out as a lifeguard. What I said is that it would be a waste of time and cost to teach someone to swim..
The requirements are certainly a challenge when trying to find qualified guards to operate two water parks during the winter months.
As far has Disney "headhunting" lifeguards, they do look for experienced guards when they do campus visits for the college program. Just as the look for culinary students for the restaurants or hotel management/hospitality majors for their hotels, they look for the experienced guards. It is a skill that is in demand for a high liability part of their operations.