Day & Zimmermann Ranks #79 in 2019 Defense News Top 100 List

PHILADELPHIA, PA – July 23, 2019 - Day & Zimmermann, the century-old, family-owned provider of construction & engineering, staffing, and defense solutions for leading corporations and governments around the world, has been listed on the *Defense News Top 100 List, ranking as the 79th company. For more than a decade, Day & Zimmermann has been named on the annual Top 100 Defense News list.

“We are proud to remain a prominent industry leader amongst the Top 100 companies in the defense industry,” said Steve Selfridge, President of Day & Zimmermann’s Government Services division. “This ranking is testimony to our longtime support of the U.S. Government. Our patriotism is what unites us and brings our workforce together as we provide around the clock mission critical support to the U.S. Government’s National Security Mission.”

"This great achievement year-after-year is indeed a recognition of our hard work and success with government and industry customers, which we attribute to our outstanding teams who uphold our vital mission and core values,”said Mike Yoh, President of the Munitions and Government division. “As a longstanding partner in the defense industry, we are committed to serving our customers, helping them achieve the highest levels of success with safety at the forefront of everything we do,” he added.

*Defense News compiles its rankings based on a combination of informational surveys, company annual reports, analyst research and Defense News staff research.


Founded in 1901, Day & Zimmermann is a family-owned company with a workforce of 46,000 specializing in construction & engineering, operations & maintenance, staffing, security and defense solutions for leading corporations and governments around the world.  Operating from more than 150 worldwide locations with 2.8 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 accelerating innovation around the world. We do what we say.®