Benjamin Lilly Announced as President of Day & Zimmermann’s Process & Industrial Group

Benjamin (Ben) Lilly has been appointed the role of President of Day & Zimmermann's Process & Industrial (P&I) Group. Mr. Lilly will continue to maintain his dual-leadership role as President of Mason & Hanger, the mission-critical Architecture & Engineering group within Day & Zimmermann.

The Process & Industrial division of Day & Zimmermann provides engineering, procurement, construction management, and plant maintenance services. The D&Z Process & Industrial Capfx® process delivers capital effectiveness, offering the opportunity for predictable cost savings compared to a conventional approach to project delivery.

“I am extremely excited for the unique value our Process & Industrial engineering business brings to the industry today and into the future,” stated Lilly. “We already have a number of shared synergies and strategies across Day & Zimmermann driving our momentum to execute upon new opportunities and added services on the horizon for our key customers,” he added.

Lilly brings deep industry experience to his new role having spent the entirety of his career providing multi-discipline engineering solutions to the government sector.

Lilly first joined Day & Zimmermann, a Mason & Hanger Company in May of 1994 as a junior civil engineer, one year out of the Virginia Military Institute. He earned his Professional Engineering License in 1998 and became the Assistant Civil Department Head in 2000. In 2001, he began supporting Department of State – Overseas Buildings Operations. In 2002, he became the Civil Department Head, and in 2006 began a three year transition into Market Director for the International Programs until becoming President of Mason & Hanger in 2017. Lilly holds a Bachelor’s of Science in Civil/Environmental Engineering with a minor in Mathematics from the Virginia Military Institute (VMI).



Founded more than a century ago on ground-breaking engineering and design services for the industrial sector, Day & Zimmermann’s Process & Industrial group continues that legacy of innovation today offering a comprehensive range of engineering and design services.  Our experienced engineering resources seamlessly deliver strategic planning, conceptual engineering, front-end engineering, detailed engineering, 3D digital facility lifecycle solutions, and more.  P&I offers flexible execution strategies including Engineering, Procurement, and Construction Management (EPCM) services, site-based teams, in-plant staff augmentation and seconded personnel.

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.®


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