Day & Zimmermann
Construction · Philadelphia, Pennsylvania
Products & Services
About Day & Zimmermann
Day & Zimmermann specializes in construction & engineering, O&M, staffing, security and defense for leading corporations and governments around the world.
Its primary NAICS classification is 541330 (Engineering Services). Day & Zimmermann is one of 8,800 Construction companies listed in Pennsylvania.
Business Contact Information
- Phone
- +1 (215) 2998000
- Fax
- +XXX (404) 8291336
- Website
- http://www.dayzim.com
- facebook.com/dayzim
- Address
- 1500 Spring Garden St, Philadelphia, Pennsylvania, 19130, United States
Industry & Classification
- Industry
- Construction
- Sector
- Construction
- Segment
- Industrial construction
NAICS Codes
- 54Professional, Scientific, and Technical Services
- 5413Architectural, Engineering, and Related Services
- 541330Engineering Services
SIC Codes
- 87Engineering, Accounting, Research, Management, And Related Services
- 871Engineering, Architectural, And Surveying
- 8711Engineering Services
Company Details
- Employees
- 43,000 (10,000+)
- Annual Revenue
- $3.0B ($1B-$5B)
Day & Zimmermann: frequently asked questions
What does Day & Zimmermann do?
Day & Zimmermann specializes in construction & engineering, O&M, staffing, security and defense for leading corporations and governments around the world.
Where is Day & Zimmermann located?
Day & Zimmermann is headquartered at 1500 Spring Garden St, Philadelphia, Pennsylvania, 19130, United States.
How many employees does Day & Zimmermann have?
Day & Zimmermann has about 43,000 employees (the 10,000+ range).
What is Day & Zimmermann's annual revenue?
Day & Zimmermann's annual revenue is estimated at $3.0B (the $1B-$5B range).
What industry is Day & Zimmermann in?
Day & Zimmermann is in the Construction / Construction industry, and its primary NAICS code is 541330 (Engineering Services).
How can I contact Day & Zimmermann?
Its website is www.dayzim.com and its phone number is +1 (215) 2998000.
What companies are similar to Day & Zimmermann?
Other large construction companies in Pennsylvania include Toll Brothers Inc, Westinghouse Electric Company LLC, Asplundh Tree Expert LLC and Soletanche Freyssinet.
Largest construction companies in Pennsylvania
Largest companies in Pennsylvania
Largest construction companies
Manufacturing sales in Pennsylvania, 2026
In Pennsylvania, Factur's 2026 study counted 44 manufacturing quotes worth $1.6M and 10 purchase orders over 12 months: 23% of quotes became orders, against 21% nationally. See the Pennsylvania data.
Own this business?
Keep your profile accurate — or ask us to take it down. We acknowledge requests within 7 days and resolve them within 30 days.
Prefer email? privacy@facturmfg.com
Add this badge to your website — show visitors you're listed on Factur Data.