For A Better Tomorrow
A full-service civil engineering firm with vast areas of expertise.
With a reputation built on water and wastewater management, OEI has expanded its services to offer a powerful array of services in our industry. Led by our founder Rich Oller, our mission is to provide water and wastewater services with a boots-on-the-ground approach, an approach that places importance on client relationships and assured solutions that bring concepts to fruition. Through innovative technologies, OEI is actively working toward developing decision-support capabilities to enable sustainable and resilient water resource solutions.
30 Years of Expertise
Our Trusted Clients
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