AQX Engineering is a full service, engineering firm headquartered in Santa Ana, California with branch offices in San Jose and San Diego. We provide a wide variety of services ranging from home additions and remodels to multi-family residential projects, and from re-imaging / remodel, commercial projects to ground-up big buildings on flat lots or sloped lots. Mr.Tagart established Computerized Construction Services in 1981. Dr. Xiao took over his firm in 2004 and renamed it to AQX Engineering.