I always thought of HUNK as just a straight-up mercenary.
So, after Umbrella crumbles - it's possible HUNK would have wound up doing contract work for the Government. And why not be teamed up with Leon? They have experience with similar assignments.
This pic is awsome! it also helps that the cosplays are awsome aswell! with blury leon in back and HUNK going all "Hang on". But why is Leon Working with HUNK... Doesn't he hate Umbrella? ((Remembers a pick taken at AUSA with Leon holding an Umbrella T-Shirt with Wesker...)) Oh!