Yes, in most cases. While Metal Pro provides the structural engineering for the steel frame itself, that is only one piece of the puzzle. You will likely need a local architect (or a licensed designer for smaller buildings under 600m²) to handle the Site Plan Control and Zoning approvals.
Furthermore, if your store is classified as a “Part 3” building (typically over 600m² or 3 storeys), Canadian law mandates an architect to design the safety features, such as fire exits, accessibility ramps, and occupancy loads.