Christiansen & Sergi, Inc. was established in 1978 as Christiansen Engineering which provided civil and environmental engineering services to public and private sector clients. Founder Philip Christiansen had an extensive resume in the field of civil engineering that included experience in infrastructure design, pollution control, hydraulics and landfill design. As the company continued its growth in both staff and services provided, the name was changed in 1985 to Christiansen & Sergi, Inc. to reflect the contributions of the principal land surveyor Michael Sergi.
At the start of 2018, Christiansen & Sergi was acquired by The Morin-Cameron Group, Inc. MCG is committed to providing the high quality level of service that CSI has provided since 1978.
