Day & Zimmermann Ranked #31 by Engineering News-Record in 2018 Top 100 Green Buildings Design Firms List

PHILADELPHIA, PA – SEPTEMBER 18, 2018 – Day & Zimmermann (D&Z), the century-old, family-owned provider of construction & engineering, staffing and defense solutions for leading corporations and governments around the world, was ranked #31 by Engineering News-Record in its 2018 list of top 100 green buildings design firms for the second consecutive year. Day & Zimmermann also ranked #3 in green design contractors by sector for government offices.

“Mason & Hanger, a Day & Zimmermann Company, is pleased to maintain our position among ENR's Top 100 Green Design industry leaders,” said Ben Lilly, President of Mason & Hanger, a Day & Zimmermann company, providing architecture and engineering services with a specialization in energy and sustainability.  “As we work to design government facilities that support critical missions domestically and abroad, our expertise keeps us delivering above and beyond the needs of our customers. Our mission of Building a More Secure World, is fulfilled as we incorporate critical elements that improve efficiency, sustainability, and resiliency in our designs for the U.S. Government.”

The Top 100 Green Design Firms in 2017 generated $6.21 billion in design revenue as a group from projects registered with and actively seeking certification from third-party ratings groups under objective sustainable-design standards, such as the USGBC’s LEED standards. For the group, this revenue is a 3.7% increase from the $5.99 billion in 2016. Domestically, green design revenue rose 3.7%, to $5.01 billion, in 2017, from $4.83 billion in 2016. The Top 100 had $1.20 billion in revenue from green projects outside the U.S. in 2017, up 2.9% from 2016.


Mason & Hanger, a Day & Zimmermann Company, is dedicated to providing architectural and engineering services, specializing in the worldwide design of secure, mission-driven facilities, proudly serving as a partner to the United States Government for nearly two centuries. As one of the oldest operating A/E firms in the United States, Mason & Hanger has a rich history covering nearly 200 years and our teams have served the federal government on thousands of projects, in 48 states and 164 countries.      

Founded in 1901, Day & Zimmermann is a family-owned company with a workforce of 43,000 specializing in construction & engineering, operations & maintenance, staffing, security and defense solutions for leading corporations and governments around the world.  Operating from more than 150 worldwide locations with 2.5 Billion USD in revenue, Day & Zimmermann is currently ranked as one of the largest private companies in the U.S. by Forbes. Headquartered in Philadelphia, PA, our first work was to develop "Betterment Reports" that helped modernize American factories. Today, we are still in the business of betterment—maintaining the nation's power infrastructure, protecting American freedoms and accelerating innovation around the world. We do what we say.®





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