Strategic Planning
For A Better Tomorrow

A full-service civil engineering firm with vast areas of expertise.

A Legacy
of Success

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

Services

Water & Wastewater

Environmental

Stormwater & Drainage Management

Land Development & Site Improvements

Transportation

Water & Wastewater

Environmental

Stormwater & Drainage Management

Land Development & Site Improvements

Transportation

Our Trusted Clients