PHILADELPHIA, PA--(Marketwired - Sep 30, 2015) - Day & Zimmermann (D&Z), the century-old, family-owned provider of construction and engineering, staffing and defense solutions for leading corporations and governments around the world, announced today it has been ranked as Engineering News-Record (ENR)'s number one Operations and Maintenance contractor in the power industry for the eighth year in a row.

The ranking is part of ENR's annual Top 400 Contractors Survey featured in its September Sourcebook. The Sourcebook provides market analysis and rankings of the leading U.S.-based architectural and engineering firms in an assortment of industry sectors.

"Over our company's history, we have been committed to achieving excellence in services to the power industry," said Michael McMahon, president of Day & Zimmermann's Engineering, Construction and Maintenance group. "Through eight years of market ups and downs and changing industry dynamics, we have maintained the highest levels of safety, quality, innovative solutions and reliability. Eight straight years on this list is a testament to our ability to do what we say while also delivering increasingly better results for our customers."

In addition to earning the top O&M contractor status, D&Z moved up two spots from 2014 and ranks number four on the list of Top Contractors in Power.


Day & Zimmermann is a century-old, family-owned company whose 23,000 employees specialize in construction & engineering, staffing 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. Founded in 1901 and 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.®

Contact Information:

Company Contact:
Steve Wanczyk
215-564-3200 x114