Easily. My estimates put him in his early 30s during the single player campaign (why didn't we get to celebrate his birthday during the war!?), so he'd only be in his 50s by the time of Discovery. As he practically won the Nomad War by himself, I don't think there's any chance he got shot down by Nomads or pirates or such. Not to mention he's flying Order ships, which are pretty good, I reckon.
His 'official' fate states him as being on a mission for the Order, details unkown. Probably pulling a Revan, running away to try to take out the Nomads themselves. Silly man, he should just assault the Dyson Sphere again! It worked before, when EVERY SINGLE NOMAD SHIP IN SIRIUS was apparently pulled into the gate, through the WALLS OF THE DYSON SPHERE.