Older teachers should try the private schools
For those worried about finding work in their sixties and beyond, I am 65 and work full-time with a work permit and visa in Phuket. Hitting 60 in Thailand is a problem because the government stipulates that you cannot be employed in any Thai state school. Therefore, no contract, work permit or visa. My solution was a private school. If they are reputable in the area, then the Thai Labor Department and Immigration Department can rubber stamp it. However, I am fully qualified and experienced which also helps. I have three months to go until my UK pension kicks in and I leave the farce that is Thai education. I can't wait.
Martyn