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BREAKING NEWS: PROFESSIONAL ENGINEERING ASSOCIATES (PEA) JOINS MAINSTAY ENGINEERING GROUP: Mainstay Engineering Group is proud to announce the acquisition of Professional Engineering Associates (PEA). Click to Read More...

Building the Foundation
for Your Innovation

At Mainstay Engineering, we are the bedrock of tech innovation.

Nationally recognized as a leader in civil and structural engineering services, we build the foundation that empowers high-tech and mission critical companies to soar. With our unwavering commitment to precision, quality and excellence, our long-term strategic partnerships with life sciences, semi-conductor, battery, data center and clean energy clients, we provide the essential support and expertise that ensures the best solution for your project.

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