Re: Personnel shortage upper age criteria.
We can confirm for ET(ME), ET(WE) and AET, applicants must complete all selection elements and enter service and commence Initial Naval Training, irrespective of when they commence the selection process, before they reach their 34th birthday.
The job that possibly closest fits the bill with regards "hands-on" is ET(WE)CIS, upper age 36 and it is a shortage category branch, so worth having a look at.
Most service jobs involve a physically active aspect but Warfare specialisations often also involve working outdoors. Best bet? Pop into your nearest AFCo and have a chat about various options.
Best of luck.