I was in an interview process with a company for an architect position. I was very up front that I was more suited for CTO positions which they didn’t have open and I’d only be willing to work a few hours/week as I started my own business. They wanted that role full-time but mentioned an RFP would be coming out soon from their leadership team.

I don’t generally think RFPs are a good fit (we’ve filed out a few since and haven’t seen much response). If you can get RFP with a relationship then you might have a chance.

There’s lots of aggregators (sam.gov for example) but I’d recommend your local jurisdictions (city, county, state) - check their websites and see if any proposals fit your style. Often, locals get preferential consideration.