Retaining wall or Foundation Contractor Recommendation in St Louis

[Chris Winterhalter]

I have a 120' long and 6-8' high concrete retaining wall that needs to be demoed & replaced (low chance of being repaired).  It sits between two complexes and is leaning into my building.  

Looking for a few solid recommendations for retaining wall/foundation contractors in St Louis.  The property is located in the city.  I am fine going back with block or a more cost effective option than poured concrete as long as an engineer signs off on it.  

Thanks,

Chris