Key contacts
Justin Lewis, PE, is a Branch Manager at Keller North America.
Justin has more than 15 years of experience in geotechnical construction. He holds both a bachelor’s and master’s degree in Civil and Environmental Engineering from the University of Illinois Urbana-Champaign with a focus on geotechnical engineering.
Since joining Keller in 2008, Justin has progressed through roles including Field Engineer, Project Engineer, Project Manager, Division Manager, and Project Executive, developing expertise in jet grouting, earth retention, micropiles, and driven piles while leading teams in the design and delivery of complex geotechnical projects.
Greg Terri, PE, is a Business Development Executive at Keller North America.
Since joining Keller in 2005, Greg has held leadership roles including Project Manager, Area Manager, Branch Manager, and Business Development Executive, supporting geotechnical projects across the Midwest and nationwide. Greg brings extensive experience in deep foundations, ground improvement, earth retention systems, grouting, soil mixing, rigid inclusions, micropiles, driven piles, drilled shafts, and geotechnical monitoring. In his current role, he works with owners, engineers, contractors, and Keller operations teams to develop strategic opportunities and deliver complex foundation solutions for major infrastructure, industrial, and commercial projects.
Greg earned a degree in Civil Engineering from Northwestern University and a Master of Science in Geotechnical Engineering from University of Michigan. He is a licensed Professional Engineer.