Norwood, Mass.-based GZA GeoEnvironmental, Inc., a leading geotechnical and environmental consulting firm, has acquired consulting firm Heller and Johnsen.

Stratford-based Heller and Johnsen, established in 1993, specialize in geotechnical engineering services for real estate development and geotechnical field testing services for contractors.

Larry Johnsen, one of the founders of the firm, will serve as a retained consultant to GZA and will remain actively involved in GZA’s geotechnical practice going forward. The technical staff of Heller and Johnsen includes six professional engineers who will continue to serve Heller and Johnsen’s clients and combine forces with GZA’s Fairfield and Glastonbury offices to provide significantly expanded geotechnical services for GZA in Connecticut.  In the coming months the Heller and Johnsen staff and GZA’s Fairfield staff will merge and relocate to a new office space, providing a unified presence in the local markets.

“We are extremely pleased that Heller and Jensen has joined GZA,” William Hadge, president and CEO of GZA GeoEnvironmental, Inc., said in a statement.  “It has been a goal of ours for a number of years to further strengthen and expand our geotechnical and field testing services in southern New England, and we are very happy that Larry and his team have decided to be part of GZA.  They bring a very strong reputation and outstanding client relationships to us and we look forward to continued growth of our practice.”