EST, Inc. has grown to be a leader in providing comprehensive engineering services
for a variety of projects in the State of Oklahoma. Since its inception, EST has
valued the concept of providing ample manpower and resources to offer quality engineering
services and technical expertise on any project regardless of size or location.
Collectively, EST has provided engineering services for various types of civil engineering
projects that include, but are not limited to, the following:
EST fields a staff comprised of Professional Engineers, Scientists, Consultants, Engineers-in-Training, and numerous design, field and laboratory technicians with hundreds of years of combined experience in providing engineering services. Our clients served include, but are not limited to, the following: Oklahoma Department of Transportation, Oklahoma Transportation Authority, Tinker Air Force Base, Tulsa District Corps of Engineers and various municipalities across Oklahoma.
EST Inc. is committed to using technology to improve project delivery. EST Inc. owns high-tech land surveying equipment and continuously upgrades our hardware and software to meet the needs of our clients, improve efficiency, and develop state-of-the-art documents, designs, and deliverables. Our clients know they can depend on us, and they continually use our services on subsequent projects. Their repeated requests for our services demonstrate that we have earned their respect and confidence. With our combined resources EST has the personnel and experience to offer virtually any engineering service under one roof.

News & Updates:
New Environmental Branch: EST is proud to announce the addition of a full service Environmental Branch to Design.
EST Welcomes Leo Chen: EST´s Tulsa Office welcomes designer Leo Chen, Ph.D. P.E. to our team. Mr. Chen is a Senior Engineer with experience in roadway and bridge design as well as hydraulic modeling and research and planning for municipal engineering projects.