What departments does Day & Zimmermann have?

Day & Zimmermann has employees across 11 departments including Entrepreneurship, Business, Engineering, Information Technology, Recruiting.

What is the largest department at Day & Zimmermann?

The largest department at Day & Zimmermann is Program & Project Management with 4 employees.

Where are Day & Zimmermann employees located globally?

Day & Zimmermann has employees across 6 continents and 17 countries including Libya, Nigeria, Iran, Japan, Kuwait.

How has Day & Zimmermann's team size changed over time?

Day & Zimmermann's team has decreased from approximately 4.4K to 2.2K employees based on available data.

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Day & Zimmermann Employee Directory

Q: Who are Day & Zimmermann's key employees and leadership?

Day & Zimmermann's key employees include: Chairman Chief Executive Officer: H. Y., Chief Executive Officer: K. B., Vice President Staffing & Recruiting: S. H., Vice President Human Resources: L. M., Vice President Project Controls Ecm: A. P.

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.

Day & Zimmermann Global Highlights

North America
2.8K

United States Of America
2.8K
Canada
17
Mexico
1

Europe
13

United Kingdom Of Great Britain And Northern Ireland
8
Germany
2
Ireland
1
Poland
1
Austria
1

Asia
5

Iran
1
Japan
1
Kuwait
1
Indonesia
1
Philippines
1

Oceania
3

Australia
3

Africa
2

Libya
1
Nigeria
1

South America
1

Peru
1

Day & Zimmermann's Leadership

K. B.
Chief Executive Officer
Mobile Phone
Email
S. H.
Vice President Staffing & Recruiting
Mobile Phone
Email
L. M.
Vice President Human Resources
Mobile Phone
Email
A. P.
Vice President Project Controls Ecm
Mobile Phone
Email
E. T.
Vice President Information Technology
Mobile Phone
Email
H. L.
Vice President For Government Relations
Mobile Phone
Email
J. H.
Vice President - Staffing And Recruiting
Mobile Phone
Email
J. D.
Vice President Fossil Projects And Construction
Mobile Phone
Email

Day & Zimmermann Employee Metrics

100%

50%

2026

2025

Program & Project Management
Engineering
Operations
Human Resources
Arts & Design
Other
Analytics
Civil Engineering & Construction
Administrative
Manufacturing
Recruiting
Healthcare Services

Contact profiles from Day & Zimmermann

Name

Title

Contact

Location

Last Update

A. Y.
President Munitons And Government
Mobile Phone
Email
Oct 23, 2024
A. S.
Founder And Owner
Mobile Phone
Email
Oct 23, 2024
D. R.
President
Mobile Phone
Email
Oct 22, 2024
D. M.
President
Mobile Phone
Email
Oct 22, 2024
D. V.
Owner
Mobile Phone
Email
Oct 22, 2024
D. M.
President Government Services
Mobile Phone
Email
Oct 23, 2024
H. P.
Owner
Mobile Phone
Email
Oct 23, 2024
H. Y.
Chairman Chief Executive Officer
Mobile Phone
Email
Jul 25, 2026
J. G.
Business Owner
Mobile Phone
Email
Oct 22, 2024
J. M.
Owner
Mobile Phone
Email
Oct 21, 2024

Frequently Asked Questions

What is Day & Zimmermann known for?

Day & Zimmermann was founded in 1901 and operates in the Construction industry. You can contact Day & Zimmermann's main corporate office by phone at

+1-215-299-****

. Explore Day & Zimmermann's company overview page for more information.

What is Day & Zimmermann's most common email format?

Day & Zimmermann employees' email format typically follows the pattern of First.Last@dayzim.com. Trying to find reliable and up-to-date employee contact data? Find more Day & Zimmermann email formats with LeadIQ.

How many employees does Day & Zimmermann have currently?

Day & Zimmermann has approximately 4.2K employees as of August 2026. These team members are located across 6 continents, including North America, Europe and Asia.

Who are Day & Zimmermann's key employees and leadership?

As of August 2026, Day & Zimmermann's key employees include:

Chief Executive Officer: K. B.
Vice President Staffing & Recruiting: S. H.
Vice President Human Resources: L. M.
Vice President Project Controls Ecm: A. P.
Vice President Information Technology: E. T.

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Day & Zimmermann Employee Directory

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