[rrrodia]

kudos to your dad! (And you for trying to help). I feel like this issue is an overlooked aspect of our world, and often met with cynicism.

I agree with the suggestion to work on bank systems, or any place with old legacy systems that need updating. (he seems to have experience in that area?)

Any place where there might be a hidden bias for 'experience', even if your dad doesn't have knowledge of the specific language.

The other fields i'm thinking of is automation, or a mentor / teaching role?

Are former colleagues / peers of him still working? Maybe you can get some ideas via them.