O'Brien Engineering, Inc. (OEI) is an engineering firm located in North Texas. We were established in 1987 as a specialty firm providing hydraulic/hydrologic modeling and analysis. We remain true to this core competency including dam and levee safety while diversifying with complementary disciplines including general civil engineering, mechanical and electrical engineering, structural engineering, environmental, permitting, and other support services to best serve our clients: real estate services, survey management, program management, architecture, etc. A certified Service Disabled Veteran Owned Small Business (SDVOSB) and State of Texas HUB firm, we serve customers nationwide and overseas. Our work and clients are diversified; we serve federal, municipal, state, other A/E firms, and private individuals. Our federal customers include DoD, DHS, and VA. We hold multiple IDIQ and MATOC contracts as a prime.