GZA is a multi-disciplinary, employee-owned firm providing Geotechnical, Environmental, Ecological, Water, and Construction Management services. GZA’s more than 700 professionals are based in 30 offices in New England, the Mid-Atlantic, the Great Lakes States and Colorado. Our corporate headquarters is at 249 Vanderbilt Avenue, Norwood, MA 02062. GZA’s Mid-Atlantic offices include Fairfield, Hammonton, and South Bound Brook, N.J.; New York (Manhattan) and Melville, N.Y.; and Lansdale and Philadelphia, Penn.