Day & Zimmermann Names Joseph Zwetolitz Vice President of Nuclear Operations

PHILADELPHIA, PA – November 10, 2017 – 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, today announced the appointment of Joseph Zwetolitz as Vice President of Nuclear Operations. In his new role, Mr. Zwetolitz will be responsible for the safe and cost-effective delivery of maintenance and modifications services and projects for a key D&Z client account.

Mr. Zwetolitz has more than 30 years of experience working with a diverse set of energy and industrial technology companies. He has worked for a number of large OEM and services companies including AREVA where he served as Sr. Vice President of Nuclear Services. In this role, he was responsible for a 1,000 person, U.S.-based team providing plant maintenance and engineering services. Prior to joining D&Z, Zwetolitz served as CEO of ENEXIO, a private equity owned, global supplier of power plant cooling solutions and services. 

He holds a bachelor’s degree in mechanical engineering from Penn State University and an MBA from Lynchburg College in Virginia. 


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.®