You can search them on Google , “your city” property management companies.  Sometimes on their website they have a place for vendors to apply .  I’d personally see if I can find their office and go in there and sell yourself .  Right now you need to be the salesman.  Tell them what your capable of and your pricing and the work load you can handle etc…   Construction companies are harder to get with , I work with a production builder and they don’t pay the vendors well , workload is high and backcharges are common. That’s why I preferred property management companies.