Day & Zimmermann Ranked in the 2021 Defense News Top 100 List

Day & Zimmermann, a leading provider of construction and engineering, staffing and defense solutions for corporations and governments around the world, has been ranked as one of the worlds largest defense companies in the 2021 Defense News Top 100. It is the companys 13th consecutive year appearing on the annual ranking of the largest global defense and national security companies shaping militaries around the world.

“Our placement among the 2021 Defense News Top 100 is a testimony to our ongoing commitment to the Mission of U.S. National Security,” said Steven Selfridge, President of the Government Services division. “With nearly two centuries of history designing, building, operating, and protecting America’s infrastructure and personnel, we remain agile and ready to support the Mission in every way.” 

 “We are proud to be listed as one of the world's leading defense companies providing support to the United States military,” said Mike Yoh, President of the Munitions and Government division. “Our inclusion reinforces Day & Zimmermann's position as a leader in the industry and reaffirms our commitment to providing the highest quality products and services to our government and defense clients around the world.” 

Defense News' Top 100 list is based on defense-related annual revenues for companies worldwide and is solicited from companies, from companiesannual reports, from analysts, and from research by Defense News, the International Institute for Strategic Studies and SPADE Indexes.


ABOUT Day & Zimmermann

Founded in 1901, Day & Zimmermann is a family-owned company with a workforce of over 41,000 specializing in construction & engineering, staffing and defense solutions for leading corporations and governments around the world. Operating from more than 150 worldwide locations with 2.4 Billion USD in revenue, Day & Zimmermann is currently ranked as one of the largest private companies in the U.S. by Forbes. Headquartered in Philadelphia, PA, our first work was to develop "Betterment Reports" that helped modernize American factories. Today, we are still in the business of betterment—maintaining the nation's power infrastructure, protecting American freedoms and driving technological advancements around the world. We do what we say®