Contact Us Contact information H & J International, PC8 Penn Center, 1628 JFK Blvd. Ste 401Philadelphia, PA 19103Email: inquiry@hnjengineers.comPhone: 215-560-8176Fax: 215-940-985 H & J International, PC4037 Runnymead Dr, Ste BCollegeville, PA, 19426Email: inquiry@hnjengineers.comPhone: 610-489-1470Fax: 610-489-6340