Insights

Defense growth Strong expansion in defense-related facilities and production capacity, including multi-year private investments and new munitions production capabilities, signals ongoing demand for specialized construction, heavy industrial services, and program management.

Nuclear collaboration Strategic partnerships in the nuclear sector with entities like Fast Forward and Deep Fission indicate opportunities to offer design-build, construction, and integration services for advanced reactor projects and related infrastructure.

Engineering rank Consistent recognition as a top design firm and a large employee base create openings to position Day & Zimmermann as a preferred contractor for large-scale engineering, procurement, and construction (EPC) programs across federal, defense, and industrial clients.

Regional expansion Recent facility expansions such as the Parsons, Kansas project highlight capabilities for scaling operations regionally, enabling sales efforts around site development, modular construction, and on-site operations support with government and defense partners.

Workforce partnerships Active collaboration with community colleges and workforce initiatives suggests a value proposition for clients seeking trained, certified labor pools, localized staffing solutions, and workforce development programs tied to project delivery.

Similar companies to Day & Zimmermann

Day & Zimmermann Tech Stack

Day & Zimmermann uses 8 technology products and services including HubSpot Analytics, Linkedin Insight Tag, iCIMS, and more. Explore Day & Zimmermann's tech stack below.

Media & News

Day & Zimmermann's Email Address Formats

Day & Zimmermann uses at least 4 email formats:
Day & Zimmermann Email FormatsExamplePercentage
First.Last@dayzim.comJohn.Doe@dayzim.com
88%
Last.First@dayzim.comDoe.John@dayzim.com
6%
Fir.Last@dayzim.comJoh.Doe@dayzim.com
4%
First.L@dayzim.comJohn.D@dayzim.com
2%

Frequently Asked Questions

What is Day & Zimmermann's phone number?

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You can contact Day & Zimmermann's main corporate office by phone at . For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is Day & Zimmermann's official website and social media links?

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Day & Zimmermann's official website is dayzim.com and has social profiles on LinkedIn.

How much revenue does Day & Zimmermann generate?

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As of August 2026, Day & Zimmermann's annual revenue is estimated to be $1B - $10B.

What is Day & Zimmermann's NAICS code?

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Day & Zimmermann's NAICS code is 23 - Construction.

How many employees does Day & Zimmermann have currently?

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As of August 2026, Day & Zimmermann has approximately 4.2K employees across 6 continents, including North America, Europe and Asia. Key team members include Chief Executive Officer: K. B., Vice President Staffing & Recruiting: S. H. and Vice President Human Resources: L. M. Explore Day & Zimmermann's employee directory with LeadIQ.

What industry does Day & Zimmermann belong to?

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Day & Zimmermann operates in the Construction industry.

What technology does Day & Zimmermann use?

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Day & Zimmermann's tech stack includes HubSpot Analytics, Linkedin Insight Tag, iCIMS, HubSpot Content Hub, Microsoft 365, Cisco, Piwik and Piwik PRO Core.

What is Day & Zimmermann's email format?

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Day & Zimmermann's email format typically follows the pattern of First.Last@dayzim.com. Find more Day & Zimmermann email formats with LeadIQ.

When was Day & Zimmermann founded?

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Day & Zimmermann was founded in 1901.
Day & Zimmermann logo

Day & Zimmermann

ConstructionPennsylvania, United States1001-5000 Employees

Day & Zimmermann is a long-established construction and engineering firm headquartered in Philadelphia, Pennsylvania. It offers a broad range of services, including construction, engineering, operations and maintenance, staffing, and security and defense, serving a global client base of corporations and governments. The company operates across 900+ workplace locations, reflecting its extensive geographic footprint. 

The organization traces its history to more than a century as a family-owned business. In 2026, Day & Zimmermann announced a partnership with Deep Fission to support the construction of a nuclear reactor in Parsons, illustrating engagement in energy and defense initiatives. Day & Zimmermann was recognized in Engineering News-Record's Top 500 Design Firms list for 2026, ranking No. 348.

Section iconCompany Overview

Phone number
Website
dayzim.com
NAICS Code
23 - Construction
Founded
1901
Employees
1001-5000

Section iconFunding & Financials

  • $1B - $10B

    Day & Zimmermann's revenue is estimated to be in the range of $1B - $10B

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