The easiest one I can think of is him getting more funding for project HARP, which might lead to him still working for Canada. Not sure how you would go about doing that though.
If continued work on project HARP gave results, and Bull stayed alive, there's a possibility that there might be a gun-based system used to launch small, hardened satellites into orbit by now. It would eliminate much of the need for having a terrible mass ratio to get into space, and might be cheaper.