About Us
About Us

Fact Sheet

Day & Zimmermann's family of companies accelerate customer success by delivering trusted services and products that create a tomorrow that is safer, more secure, more innovative and more productive. 

Chairman & CEO: Harold L. Yoh III

Annual Revenue: $2.2 Billion

Employees/Locations: average of 24,000 employees working in more than 150 worldwide locations

Headquarters Address:
1500 Spring Garden Street
Philadelphia, PA 19130

Web Address: http://www.dayzim.com

Media Contact: media.relations@dayzim.com

Key Facts:

  • Ranked one of the largest private companies in America by Forbes.
  • Founded in 1901 and headquartered in Philadelphia, PA.
  • Recipient of the U.S. National Family Business of the Year Award.
  • Completed projects in more than 75 countries.
  • Serving more than 1,300 customers worldwide, including more than 45% of the FORTUNE® 100.
  • Our customer promise: We do what we say.®
  • Our vision is to be the most admired company in the markets we serve because our employees deliver on our promises every time.
  • Values: Safety. Integrity. Diversity. Success.

Services

  • Architecture, Engineering & Construction Services – is a leading provider of architecture, engineering, procurement and construction services and delivers a wide range of design and planning, design-build, EPC, modular construction, contract maintenance, and program management services.

  • Government Services -- provides fixed and mobile security, logistics, life support, facility management, equipment operation and maintenance, and integrated program management to the U.S. Department of Defense and other government agencies and groups.

  • Maintenance & Modification Services – is a world leader in providing plant maintenance and modifications as well as specialty equipment repair and support services to industrial, utility and pharmaceutical customers.

  • Munitions – manufactures, stores and demilitarizes ammunition products and provides related services to the United States Departments of Defense and Energy and to United States-approved foreign governments and delivers facilities maintenance services to municipal, state and federal government agencies.

  • Security Services – is a leading supplier of highly technical, sophisticated protective services to commercial businesses, utilities, industrial customers and government installations.

  • Talent & Outsourcing Services – the nation's first technology staffing firm, Yoh provides specialized staffing services to companies that leverage knowledge and technology for competitive advantage.

  • Validation Services – is a leading provider of validation and CIM services to the pharmaceutical and biopharmaceutical industries for customers throughout the United States as well as the Far East, Caribbean, United Kingdom and Europe.

Contact Us

Corporate Office
1500 Spring Garden Street
Philadelphia, PA 19130
215.299.8000
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