Day & Zimmermann, a provider of construction, engineering, maintenance, staffing and defense solutions, has acquired Minnotte Contracting Corp., a Pittsburgh-based union mechanical contractor and construction company. The acquisition broadens D&Z’s union staffing and project management capabilities.

Minnotte, a privately owned company founded in 1961, serves industrial customers and power utilities in the Ohio Valley.

The transaction not only helps D&Z strengthen its service capabilities for existing construction and maintenance customers, but also allows it to expand its support of the country’s natural gas and petrochemical infrastructure

“I have long admired Day & Zimmermann as one of the most respected companies in the electric utility industry,” Minnotte Contracting owner Dave Minnotte said, in a statement. “This acquisition will be a true benefit for our customers and our employees. We are excited to join a leader in the industry and contribute to the continued success of D&Z.”

Headquartered in Philadelphia, Day & Zimmermann is a family-owned company with a workforce of 46,000 that specializes in construction & engineering, operations & maintenance, staffing, security and defense solutions for corporations and governments. The company operates from more than 150 worldwide locations with $2.8 billion in revenue.