Similar discussion here: s://.quora.com/Singapore-Is-it-advisable-to-make-a-mid-career-switch-and-sign-on-with-SAF-as-army-officer

Go MINDEF career website, read and ask them your questions.

Take note of the following:
- If you really join, you will be at least 2 rank lower than others your age. Are you / your spouse ok with that?

- Career progression. If you join ME scheme but no STEM background, likely will lose out. Unless they send u go study. Which means you will lag behind those of your age by even more. You will also be competing with other same rank officers who are younger. Can your energy, fitness, enthusiasm etc match them?

- Think far. If you think you can't last inside, don't join. Military career experiences quite useless in private sector. Unless you have military engineering or intelligence experiences.

- Retirement. How much money would you make by retirement age of 50+? What are your plans / route post retirement?


If you are still interested in MINDEF work, you can apply to be a civilian officer. Might be a better option.

Good luck.