Day & Zimmermann Ranked #31 by Engineering News-Record in 2017 Top 100 Green Buildings Design Firms List

PHILADELPHIA, PA – August 30, 2017 – 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 2017 list of top 100 green buildings design firms. This top-tier ranking represents one of the largest jumps in this year’s list – up 21 spots from #52 in 2016.

“As a Day & Zimmermann Company, we are thrilled to be featured in the top third of this list of strong and visionary organizations,” said Mick McAreavy, President of Mason & Hanger, a Day & Zimmermann company providing architecture and engineering services with a specialization in energy and sustainability. “Our vision of building a more secure world includes designing mission-critical government facilities with sustainability at the forefront of all projects. We will continue to follow this philosophy and will strive to improve the next generation of high-performance facilities.”

“Our dedicated Architecture & Engineering Practice and Energy & Sustainability Services are working to improve the efficiency, sustainability, and resiliency of buildings through creative design, advanced simulation and robust commissioning,” said Rob McAtee, Director of Energy and Sustainability Services, Mason & Hanger. “It’s really an honor to be this high on the list.”

The Top 100 Green Design Firms in 2016 generated $5.99 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 healthy 11.6% increase from the $5.37 billion in 2015. Domestically, green design revenue rose an impressive 13.1%, to $4.83 billion in 2016, up from $4.27 billion in 2015. The Top 100 had $1.17 billion in revenue from green projects outside the U.S. in 2016, up 5.6% from 2015.


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 163 countries.


Founded in 1901, Day & Zimmermann is a family-owned company with a workforce of over 42,000 specializing in construction & engineering, staffing and defense solutions for leading corporations and governments around the world. Operating from more than 150 worldwide locations with 2.4 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 driving technological advancements around the world. We do what we say.®