There are 3 categories of commercial inspectors:
Home inspectors that can do smaller commercial wood framed buildings in a pinch but may not be commercial inspectors
Certified Commercial building inspector team that is trained in all facets of commercial/industrial building inspections
Engineers
It has been believed that engineers are better, therefore, many people pay the higher costs for an engineering firm to inspect their building. Most engineers send non-engineer technicians out to do the field work as certified inspectors take the same classes as the engineers from a technical prospective.
To help you with choosing a qualified inspector make sure they are certified with CCPIA or ANSI. This helps to ensure that your inspector is qualified to handle your commercial building inspection.