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Our People.

Meet the driving force behind our commitment to excellence - our exceptional team of leaders. At Mainstay, we believe that success is not just achieved; it's engineered. Get to know the people shaping our journey, each brining a unique blend of experience, passion, and dedication to our partners, clients and Mainstay team. And get to know our Core Values that guide us in every aspect of our work.

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Pamela J. Assenmacher, PE
Principal, Quality Assurance

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Leo Doyer, PE
Design Manager

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Mark A. Paige
Southeast Regional Manager
Raleigh, NC

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Jacki Briggs, PHR
Vice President,
Human Resources

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Matthew E. Hilbush, PE
Founder

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Justin T. Ruby, PE
Principal, Project Delivery

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Michael Canalley, PE
Quality Assurance Manager

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David F. Citro, PE
Director, Civil Engineering, Associate

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Michael J. Donnelly
Controller

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Sean Marzolf, PE
Project Manager

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Laura Hughes
CEO

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Justin H. Meillier, PE, CDT
Structural Engineering Director

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Laura M. Ryan, PE
Project Manager

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Christine Sciarrotta
Vice President, Marketing

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Kurt Sponheimer, PE
Project Manager

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Shellie M. Straub
Principal, Human Resources and Administration

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