Johnson Soils Company

Johnson Soils Company is a surveyor in Glen Rock, New Jersey. The firm provides geotechnical investigation and design services, with capabilities that include site investigation, slope stabilization and erosion control, laboratory testing, site structures, rock mechanics, foundations, groundwater management, construction testing, and drone photography. Johnson Soils serves design professionals, governmental agencies, and landowners, and holds a rating of 4.70.

The company's roots stretch back to 1947, when Carol Johnson founded it as a soil testing and engineering firm that performed laboratory testing for the Army Corps of Engineers. In the 1960s, John C. Mahle, Sr., a licensed professional engineer in the Army Corps, took over and broadened the practice into engineering design and studies. His son, John C. Mahle, Jr., acquired the company in 1980 and continued that growth, with projects reaching the Azores, Indonesia, Greenland, and Brazil on highway, tunneling, and airport work. In 2005, Calisto J. Bertin, PE, who had collaborated with Mr. Mahle on projects for two decades through his own civil engineering design firm, acquired the firm's assets to form the present-day Johnson Soils Company. Lisa Mahle-Greco, daughter of John C. Mahle, Jr., became president in 2010, representing the third generation of the Mahle family to run a geotechnical investigation and design firm. The company continues to expand its work in construction testing and rock mechanics.

The office sits on Glen Avenue, just steps from Demarest Park and the Glen Rock Post Office. Glen Rock-Boro Hall station is about a tenth of a mile away, with Veteran's Park and the Glen Rock-Main Line station roughly a fifth of a mile from the office, and Maple Avenue nearby.

Three generations of family ownership and more than seventy-five years of continuous geotechnical work have made Johnson Soils Company one of the longest-operating soil testing and engineering firms in northern New Jersey.