Day & Zimmermann is a century-old, family-owned company specializing in construction & engineering, operations & maintenance, staffing, security and defense for leading corporations and governments around the world.
Founded in 1901
$2.7 Billion Annual Revenue
150+ Worldwide Locations
Footprint at 60% of the U.S. nuclear fleet
Ranked in Top 100 Defense Companies
#1 Ranked Operations & Maintenance Contractor for 13 consecutive years (ENR)
Ranked #200 on the Forbes America's Largest Private Companies List
Yoh Named to HRO Today’s MSP, RPO and Total Talent Solutions Baker’s Dozen list
In a constantly changing world it’s not businesses, governments and institutions that will build the future. It’s the people behind them. For more than a century Day & Zimmermann has hired, placed and trained the people that helped bring big ideas to life.
The best way to learn about life at Day & Zimmermann is to hear from the people who are living it. Meet the people behind our success.
“One of the most challenging, and rewarding, parts of my job is building a high-performing team. The diversity of the team is critical to bringing innovation to the project and delivering success.”
GENE, DIRECTOR OF NUCLEAR PROJECTS