Advice for doing my job with osteoarthritis

samo36

Hi,
i am new to this site and and looking for advice over my current job
i have osteoarthritis in my left shoulder which was operated on two years ago. And recently been diagnosed with having it in my right knee and cervical spine 5th 6th 7th disc
i am a current serving prison officer and have been for 24 yrs also i severed as a guardsman in the forces for 4yrs
my consultant has told me a need complete change of lifestyle and job as he said that i would be unable to fulfill my duties in my current role.
I am struggling to adapt as i have kept myself in good shape over the years and looked after my body .They think that it has been past on genetically as my mother suffered with it .
i have to face a medical inefficiency board as my current governor has said that they cannot support me in my current role and offered a re-role with a wage cut.
It looks like i will have to find another job at the age of 46 and i am struggling mentally to know my next steps .
Any help or advice would be welcome as i am at my whits end
thank you