O’Brien Engineering, Inc.

O’Brien Engineering, Inc. (OEI) is a North Texas multidisciplinary architecture, engineering, and environmental firm serving public and private clients nationwide. Originally focused on civil engineering and surface-water problems, it now provides architectural and engineering design, facilities and infrastructure planning, water-resources work, real-estate support, project management, and construction-phase services. Its disciplines include civil, mechanical, electrical, plumbing, and structural engineering, as well as architecture and interior design.