Company Information
Business Directory

Day & Zimmermann is a family of companies that provides services to businesses and governments in six business areas.

Corporate Office

Day & Zimmermann Group, Inc.
1500 Spring Garden Street
Philadelphia, PA 19130
215.299.8000

A/E/C and Plant Services Companies

Providing architecture, design, engineering, construction management and plant services to businesses around the globe and to the U.S. government.


United States
Day & Zimmermann International, Inc.
125 The Parkway
Greenville, SC 29615
p 864.241.6700
email

Europe

Day & Zimmermann LTD
Broadstone House,
Broadstone Rd,
Reddish, Stockport,
Cheshire, SK5 7DL 
United Kingdom
p 0161.9755800
email

Mason & Hanger is a full-discipline architecture-engineering-construction firm known for: Fire Protection, Anti-Terrorism - Force Protection - Force Projection, Blast Design - Munitions Expertise, and LEED - Sustainable Design - SPiRiT

Mason & Hanger
The Mason & Hanger Group, Inc.
300 West Vine Street
Suite 1300
Lexington, KY 40507
p 859.252.9980
email

   
Government Services Companies

Day & Zimmermann provides fixed and mobile security, logistics, life support, facility management, equipment operations and maintenance, and integrated program management to the U.S. Department of Defense and other government agencies.

Corporate Office
Day & Zimmermann, Inc.

1500 Spring Garden Street
Philadelphia, PA 19130
p 215.299.8000
email

Day & Zimmermann
Hawthorne Corporation

2 South Main Street
Building No. 2
Hawthorne, NV 89415-0015

Government Security
Day & Zimmermann LLC
1500 Spring Garden Street
Philadelphia, PA 19130
p 215.299.8000

   
Munitions Companies
Day & Zimmermann provides munitions production and related technology, facility, security and management services to the U.S. and approved foreign governments and defense contractors.

Corporate Office
Day & Zimmermann, Inc.

1500 Spring Garden Street
Philadelphia, PA 19130
p 215.299.8000
email

Kansas Division
Day & Zimmermann, Inc.
23018 Rooks Road, Suite A
Parsons, KS 67357-8403

Lone Star Division
Day & Zimmermann, Inc.
Highway 82 West
Texarkana, TX 75505-9100


Mason & Hanger Corporation
(Newport Chemical Depot)
P.O. Box 400
Newport, IN 47966-0400

   
Power Services Companies
Day & Zimmermann Power Services is a leading provider of plant maintenance, modification and specialty services to the power market. 

Corporate Office
Day & Zimmermann Power Services
 
1866 Colonial Village Lane, Suite 101
Lancaster, PA 17601
p 717.481.5600
email

Day & Zimmermann NPS® Corporate 
1866 Colonial Village Lane, Suite 101
Lancaster, PA 17601
p 717.481.5600

DZ Atlantic Corporate

5426 Robin Hood Road
Norfolk, VA 23513
p 800.446.8131

   
Commercial Security Services Companies

Day & Zimmermann provides security services to businesses.

Corporate Office
Day & Zimmermann LLC
1500 Spring Garden Street
Philadelphia, PA 19130
p 215.656.2612
email

Puerto Rico
Day & Zimmermann Security Services
of Puerto Rico, Inc.
Corporate Office Park
State Road #20 Km 2.6
Suite 108 Box 5
Guaynabo, PR 00966
p 787.625.3381

   
Talent and Outsourcing Company

Yoh provides long- and short-term temporary and direct placement of technology and professional personnel, as well as managed staffing services, for the IT, scientific, engineering, health care and telecommunications communities.

Yoh Corporate Office
1500 Spring Garden Street
Philadelphia, PA19130
p 800.654.5911
email

   
Validation Services Companies

Day & Zimmermann provides a complete portfolio of qualification, systems validation, regulatory compliance and quality assurance services to pharmaceutical, biotechnology and medical device companies worldwide

Corporate Office
Day & Zimmermann International, Inc.
1500 Spring Garden Street
Philadelphia, PA19130
p 215.299.8288
email

Puerto Rico / Latin America
Day & Zimmermann International of Puerto Rico, Inc.
Corporate Office Park
CPM Plaza Suite 106-107
Road 20  Km 2.6
Guaynabo, PR 00966
p 787.781.8787



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