Seeking referral for landscaping company

Hi all, we hired a designer to help us remodel our backyard which has been a neglected mess for far too many years!  Now we are looking for contractors/landscaping companies to bid on the building of the project.  It would involve demoing some concrete, removing grass, redoing irrigation, planting, moving a shed, and removing a tree.  

Any recommendations for a great landscaping company with experience would be so appreciated.  I looked at Yelp and got overwhelmed by the massive number of companies out there :P