Design & Build / Engineering

Since 1964, we have been the leading contractor in designing and building, maintaining and improving structures, custom generators, automatic transfer systems and applications for prime power and standby power systems throughout CT, NY, MA, and RI.

“NEG’s experience and obvious expertise made them the clear choice for designing and executing our project. We could not be happier with that choice.” In conjunction with our sister company Holzner Electric, we provide design-build services for industrial, commercial and residential projects for areas of Connecticut, including Fairfield, Stamford, New Haven, Westport and Greenwich, as well as Yonkers and nearby areas of Westchester County, New York.

Whatever your custom generator or enclosure needs are, we can provide a complete solution that is tailored to your needs. With certified project managers, estimators and licensed engineers on staff we will design and build the highest quality solution, deliver it on-time and on-budget.

Over our many years we have earned a stellar reputation because we continually strive not just to meet, but to exceed our customer’s needs and expectations.

For more information about our Design & Build services please contact us today or call us at (800) 972-4264


Holzner-Electric in CT
Founded in 1964 in Bridgeport, CT, Holzner Electric began as a family-owned and operated business, and has since grown to employ over 50 tradesmen, project managers, estimators, engineers and support staff. Holzner Electric provides licensed electrical contracting to federal, state and municipal agencies; commercial and residential property owners or managers; and general contractors.

Custom Generators & Enclosures

  • Requirements gathering
  • Planning and design
  • Project management
  • Procurement / build
  • Installation
  • Maintenance
  • Support


  • Licensed, professional engineers on staff
  • Trained and certified estimators and project managers
  • Bonded and Insured
  • Over 50 years of experience

Industries Served

We are proud to serve residential, commercial and industrial clients throughout CT and NY.

  • Municipal & Government
  • Data Centers
  • Telecommunications
  • Healthcare
  • Emergency Centers
  • Education
  • Manufacturing and Warehouse
  • Office & Banking
  • Retail
  • Grocery
  • Hospitality & Restaurant
  • RV Parks