O2EPCM, Inc. dba O2 Engineering, Projects & Construction Management Share: Engineering/Construction O2EPCM, Inc. dba O2 Engineering, Projects & Construction Management Visit Website Request Info 1055 W. 7th St., 33rd Fl. Los Angeles, CA 90017 213.267.8800 Map What's Nearby? Distance: 5 10 15 20 25 50 mi.