Day & Zimmermann

Founded in 1901, Day & Zimmermann is a defense prime contractor based in Philadelphia, United States working in ammunition & energetics, missiles & munitions, mro & logistics +1 more.

Day & Zimmermann is a family-owned, century-old diversified company headquartered in Philadelphia, Pennsylvania. It provides construction and engineering, operations and maintenance, staffing, security and defense services to corporations and governments. In the defense sector, it manufactures, stores and demilitarizes a range of ammunition products, including direct fire, indirect fire and close combat munitions, fuzing and precision products, and propellant and ignitor bags, and provides related services to the U.S. government and approved foreign countries. Its defense work also includes explosive ordnance storage and disposal, munitions facility operations, cleared IT support for U.S. Navy and Marine Corps communications, cyber capabilities for U.S. Government security services, and integrated security for U.S. embassies. The company reports annual revenue of 2.9 billion and a global workforce of about 37,000. It is a member of the Defense Industry Initiative on Business Ethics and Conduct.