The Geotechnical Group, Inc.
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John P. Sullivan - President
John Sullivan, President of TGG, founded the company in 1984 with a vision to offer innovative civil engineering solutions with superior client service. John has been a principle-in-charge for over 1600 projects, including high rise, mid-rise, and one-story buildings, regional shopping centers, landfills, highways, dams, tunnels, vibration sensitive high tech buildings, garages, playfields, surcharging schemes and rock fill designs.
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Mark M. Zambernardi, P.E. - Project Manager
Mr. Zambernardi has been a project engineer for a range of projects. He has been a site investigator and field
engineer on a variety of subsurface exploration projects and earthwork construction and foundation installation
projects. Mr. Zambernardi also has laboratory experience in the soil testing field.
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Geotechnical 