Company Profile

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.

Our vision is to accelerate the next generation of innovation.

Chairman & CEOHarold L. Yoh III
Annual Revenue: $2.5 Billion
Global Workforce: 43,000
Headquarters: 1500 Spring Garden Street, Philadelphia, PA 19130
Media Contact: Suzanne Watts

Our customer promise: We do what we say.®

  • Global Workforce
    45,000

     

  • 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

     

Our People
are Our Future

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.

Our People

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.

Learn More About Life at D&Z

“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