- HVAC contractor
- Address
- 5545 Baynton Street, 19144
- Phone
- +1 215-284-7583
- Website
- airmasterpa.com
No. 78 · ENR Top 400 Contractors 2026
Day & Zimmermann
Day & Zimmermann is ranked No. 78 on the ENR Top 400 Contractors list for 2026, and is listed here in Philadelphia, Pennsylvania.
Who is Day & Zimmermann?
On the ENR Top 400 Contractors list for 2026, published by Engineering News-Record, it ranks No. 78.
Its website is dayzim.com.
Day & Zimmermann is one of 15 construction companies we list in Philadelphia. Before you hire any contractor in Pennsylvania, check the license with the Pennsylvania Office of Attorney General.
What does Day & Zimmermann say about its work?
Day & Zimmermann specializes in construction & engineering, O&M, staffing, security and defense for leading corporations and governments around the world.
In the company's own words, from dayzim.com, read October 2026.
Where is Day & Zimmermann located?
Day & Zimmermann is listed in Philadelphia, PA. Its street address is not on record yet.
How big is Day & Zimmermann?
Day & Zimmermann ranks No. 78 on the ENR Top 400 Contractors list for 2026. Engineering News-Record ranks the largest U.S. contractors by construction revenue.
Source: ENR Top 400 Contractors (2026), Engineering News-Record
How do I check Day & Zimmermann's contractor license?
Search the Pennsylvania Office of Attorney General for Day & Zimmermann before you hire. We do not hold license records for individual companies. Pennsylvania requires home improvement contractors to register with the Attorney General. Other contractor licensing is handled locally.
Check a license in PennsylvaniaLicensing rules checked October 2026. Requirements change, so confirm on the state site.
What other construction companies are in Philadelphia?
We list 15 construction companies in Philadelphia. Here are 8 more.
- Plumbing contractor
- General contractor
- Address
- 311 West Raymond Street, 19140
- Phone
- +1-267-259-0342
- Website
- ameengeneralcontracting.com
- Electrical contractor
- Address
- 1219 Saint Vincent Street, 19111
- Phone
- +1 215-990-7966
- Website
- bgelectricservicellc.com
- Plumbing contractor
- HVAC contractor
- Address
- 2808 East Pacific Street, 19134
- Phone
- +1 215-722-8889
- Website
- burkeplumbinginc.com
- Plumbing contractor
- Address
- 2424 East York Street, Suite Unit 100 - B, 19125
- Phone
- +1 267-356-7282
- Website
- economydrainclean.com
- HVAC contractor
- Address
- 2041 Point Breeze Avenue, 19145
- Phone
- +1-215-389-2345
- Website
- jarmanairconditioning.com
- Electrical contractor
- Address
- 6915 Castor Avenue, 19149
- Phone
- +1-215-342-4353
- Website
- lincelectricpa.com
- Painting contractor
- Address
- 116 South 19th Street, 19103
- Phone
- +1-267-808-0959
- Website
- perrymilou.com
FAQ
Day & Zimmermann: FAQs
Where is Day & Zimmermann located?
Day & Zimmermann is listed in Philadelphia, Pennsylvania. Its street address is not on record yet.
What does Day & Zimmermann say about its work?
On dayzim.com, Day & Zimmermann describes itself like this: "Day & Zimmermann specializes in construction & engineering, O&M, staffing, security and defense for leading corporations and governments around the world."
How do I contact Day & Zimmermann?
Visit dayzim.com.
How big is Day & Zimmermann?
Day & Zimmermann ranks No. 78 on the ENR Top 400 Contractors list for 2026. Engineering News-Record ranks the largest U.S. contractors by construction revenue.
Is Day & Zimmermann licensed?
We do not hold license records for individual companies. Pennsylvania requires home improvement contractors to register with the Attorney General. Other contractor licensing is handled locally. Search the Pennsylvania Office of Attorney General to check a contractor before you hire.
For construction companies
Run a construction company in Philadelphia? Get a website that wins these searches.
We design websites only for construction companies: built to rank for searches like these, with your license, projects and an estimate form up front. Fixed $2,000, live in 7 business days.
Office locations © OpenStreetMap contributors, available under the Open Database License. Company rankings from the ENR Top 400 Contractors (2026).
