It got its first job at 4yrs, its second at 5yrs. To change my job, I made my tama first overweight then slimmed it down, had it go to work and only reach good on the job at least twice then just had it fail continuosly after that. Now I don't know if this actually what caused it to change jobs, but test it out.
If it works in real life, why not try it virtually?