Need contractor referrals for rehab of 100+ unit apartment in St. Louis, MO

I am about to buy a large 100+ unit apartment in Saint Louis, MO that needs a lot of TLC. Occupancy is less than 30% so I want a medium/larger size company to help restore it so we can get occupancy back to 80% occupancy so I can refi the bridge loan ASAP. Does anyone have a referral for reliable companies. Thanks.