What are the opposite words for superannuate?

Superannuate means "retire or be retired with a pension and benefits due to age or infirmity." A few antonyms for superannuate are: 1. Hired - engage someone to work for payment 2. Employed - give someone work and pay for it 3. Promote - give someone a higher rank or position 4. Introduce - bring a person in for a job 5. Enlist - engage someone to serve in the military All of these antonyms signify workforce engagement instead of retirement.