In 1987, OEI was established as a specialty civil engineering design firm, primarily focusing on environmental engineering and solving surface water issues. Over the decades, we have developed our industry-leading expertise in water resources and environmental engineering design. Along the way, we have developed a proficiency within the government arena, serving federal, state, and municipal clients. We offer our clients full architecture and engineering multidiscipline services on their vertical and horizontal projects. Our proficiency in the A/E industry has led to our development of innovative solutions and approaches for our clients’ most complex projects.