Since your OSDBU reviews all opportunities (trying to make sure things get set aside for small business whenever truly feasible), they can help you identify the proper NAICS code associated with each RFP and the size standard that goes with it.
That is key, because if there’s a contract coming up for competition in a size standard you’re too big for, then having it set aside for small business in that NAICS code does you no good.
Many professional and even administrative services opportunities are run under larger NAICS codes, but if the statement of work is defined as mainly IT work, a sub-set of admin services, that can fit under a smaller size standard that you may qualify for.
By meeting with your OSDBU staff – especially the one for your designated set-aside type, if more than just a “small” business, you can better understand how both the contracting officer and the customer are seeing and classifying the preponderance of the work.
Both parties have decision making authority, but the OSDBU small business person can influence that decision. Ultimately you want the set aside to be in a NAICS code and size standard where you can do the work.