Sales Engineering

I have sometimes worked with customers to engineer or re-engineer projects to make them fit the customers needs better and make the sale. 
 
It is a role that I feel comfortable with, though I have rarely worked in this role for more than a few hours or days at a time.
 
This is almost always a win-win for both customer and producer, as it is rare that an initial design concept perfectly nails the most efficient way to produce software, or anything, for that matter.