Subcontracted to one of the big 5 occasionally for project managmement.
Retraining to a new programming language or new platform is an option. But if he already has this Proj Mgt experience, work on a certification. Proj Mgt can be taken into any type of business (Construction, IT, Medical, Defense, etc). And the pay is as good as the techies or better. His wisdom would be a great asset.