The role in one sentence
A solution consultant works out how the customer's process should run with the product in it, and only then which configuration of the product supports that. The order matters. Starting from capability produces a proposal shaped by what the software happens to do well; starting from process produces one shaped by what the business needs to change, which is a much better predictor of whether anything improves after signature.
Where a sales engineer is also present, the division of labour is usually clean enough in practice: the engineer owns questions about the system, the consultant owns questions about the work. In smaller companies one person does both, and the risk then is that the easier question, the technical one, crowds out the harder one.
