I've put my walls back together, so I'm banking that the leaking issue is resolved. Thank you Basement Systems!
It's too early to tell if this solved the problem (I'll know next spring), however based on what was done, I am confident my issues have been rectified.
I got comfort with his approach and reassurance that there are only two types of basements - those that leak, and those that are going to leak!
I was recommended to you by a home inspector as a potential firm who could address a leaky basement. I think I made the right decision. I was pleased with the initial response, the follow up to remind me of the agreed time work was to be completed, and the professionalism of the installation crew.