It sounds like you would be a real catch with all those qualifications! - you wouldn't need any further training as such (kilns/ specialist materials would depend on the school/ college you worked at.) We have a part time technician (3 mornings a week) at a Secondary school, but think funding for such posts is becoming increasingly limited. You may have more luck looking for Design Technology technician posts? They are not usually advertised in TES, more local papers and some websites.