Day Zimmermann Ranked 172 by Engineering News Record in 2016 Annual Top 500 Design Firms

PHILADELPHIA, PA –May 4, 2016 – 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 #172 by Engineering News-Record in the 2016 Annual Top 500 construction design services firms. The annual rankings for the selected companies are listed according to revenue for design services performed in 2015.

“We are proud to once again be recognized as a Top 500 design firm by Engineering-News Record,” said Rick Domyslawski, Executive Vice President of Engineering at Day & Zimmermann. “This recognition communicates our steadfast commitment to safety, innovation and quality for those we serve around the country.”  

“Achieving this ranking is a reflection of our superior capabilities in design, architecture and engineering, as we continue to develop innovative solutions for our customers in support of National Security,” said Ron Smith, Vice President of Mason & Hanger, a Day & Zimmermann company providing engineering and architecture (A/E) solutions to the U.S. federal and state government. “We pride ourselves on pairing our deep A/E expertise with a focus on technological advancements to drive the best results for our customers.”


Founded in 1901, Day & Zimmermann is a family-owned company with a workforce of over 50,000 specializing in construction & engineering, staffing and defense solutions for leading corporations and governments around the world. Operating from more than 150 worldwide locations with 2.7 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.®


Mason & Hanger, a Day & Zimmermann Company, is dedicated to providing architectural and engineering services for federal projects -- a specialty area we have proudly served for more than 100 years.  Mason & Hanger was founded in 1827 as a railroad-engineering and construction firm headquartered in Virginia and as the United States expanded territory, projects moved westward – the company relocated in the 1870’s to its present location in Lexington, Kentucky where it currently resides. Mason & Hanger is a longstanding member of the American Council of Engineering Companies. Our important customers in this sector include the U.S. Army, U.S. Navy, U.S. Air Force, U.S. Marines, U.S. Army Reserve, U.S. Air Force Reserve, U.S. Marines Reserve, National Guard and Department of Homeland Security.