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Harold L. Yoh, III
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Who We Are
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Harold L. Yoh, III
Emmett McGrath
Michael McMahon
Steve Selfridge
Mike Yoh
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Record Diesel Generator Rebuild Project
Bridge Crane Installation Project
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D&Z Excels on Large Boiler Project
One Year Later: Partnership Continues to Grow Stronger
L-83 Boilermakers shine on Jeffrey Energy Center outages
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D&Z Customer Celebrates Successful Plant Start-up
Large U.S. chemical production plant chooses D&Z to convert industrial boilers
D&Z increases engineering productivity while reducing costs
D&Z's EPC Execution Strategy Saves Customer Millions
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Design of Top U.S. Law Enforcement and National Security Training Complex
Firing Range Program (CONUS & OCONUS)
Integrated Security for One of the Largest U.S. Embassies in the World
Ordnance Operations, Management & Operations (M&O) and Security for Largest Global R3 Demilitarization Complex
Cleared IT Support for Critical Infrastructure Communications to Unites States Navy & Marine Corps
Secured Renewed U.S. Diplomatic Presence in High Threat Region of Africa
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Yoh.com
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Global Pharmaceutical Firm
Regional Energy Transmission Services Firm
SAP, Global Technology Company
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Why Work at D&Z
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Senior Manager
Director of Organizational Development
Recruitment Process Outsourcing
Account Manager, Federal Services
Test Range, Supervisor
Cinematic Artist and Video Editor
Director of Operations
Production Operator
Diversity & Inclusion
Veteran's Resources
Our Values
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News: Featured Stories
1.21.2021
Moving Forward Together
There have been many significant turning points in American history since Day & Zimmermann was founded in 1901. As a new US president is sworn in, ...
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12.1.2020
Mason & Hanger Wins ACEC National Award for U.S. Embassy in Kosovo
Mason & Hanger is honored and humbled to be recognized by ACEC as a Grand Award Winner for the New U.S Embassy in Pristina, Kosovo. A symbol of ...
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9.17.2020
Yoh Launches DZConneX Total Talent Solution
This week, Yoh launched a new product offering, closely aligned to the project management and talent management expertise of Day & Zimmermann. Known ...
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9.16.2020
Lieutenant General (Retired) William (Bill) Phillips Joins Day & Zimmermann's Board of Advisors
US Army Lieutenant General (Retired) William (Bill) Phillips has joined Day & Zimmermann's Board of Advisors. Bill brings to our board a wealth of ...
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6.29.2020
Day & Zimmermann Ranked among Top 100 Federal Industry Leaders List by Bloomberg Government
PHILADELPHIA, PA – June 29, 2020 – Day & Zimmermann, the century-old, family-owned provider of construction & engineering, staffing, and defense ...
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6.2.2020
Chair and CEO Statement on the Death of George Floyd
This weekend, across the nation, we have seen peaceful protests as well as gut-wrenching scenes of destruction in our communities, following the ...
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11.21.2019
Day & Zimmermann Awarded Program Management and Engineering Contract by Origin International
PHILADELPHIA, PA — November 22, 2019 — Day & Zimmermann (D&Z), the century-old, family-owned provider of construction and engineering, staffing and ...
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10.21.2019
David R. Bean has joined the Leadership Team as General Counsel of Day & Zimmermann Government Services
PHILADELPHIA, October 21, 2019 -- Day & Zimmermann (D&Z), the century-old, family-owned provider of construction and engineering, staffing and ...
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8.6.2019
Day & Zimmermann Ranks #79 in 2019 Defense News Top 100 List
PHILADELPHIA, PA – July 23, 2019 - Day & Zimmermann, the century-old, family-owned provider of construction & engineering, staffing, and defense ...
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12.18.2018
Day & Zimmermann Veterans Employee Resource Group Partners with Wreaths Across America
295 Remembrance Wreaths Sponsored in Honor of Fallen Heroes PHILADELPHIA, PA – DECEMBER 18, 2018 – Day & Zimmermann (D&Z), the century-old, ...
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