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
$2.5 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 10 consecutive years (ENR)
Ranked #179 on the Forbes America's Largest Private Companies List
Yoh Named to HRO Today's RPO 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.
“I am excited to be part of an amazing organization and work with colleagues who share the same values as I have.”
HEATHER, CORPORATE COMMUNICATIONS MANAGER