Donnelly Mechanical is New York City’s premier provider of innovative commercial HVAC service, maintenance and construction. With over 30 years’ experience and 200+ employees, we serve New York City’s most prominent commercial organizations across a variety of sectors including data centers, healthcare facilities, Class-A office spaces and commercial real estate management firms. 

In July of 2021, Donnelly Mechanical became part of the EQUANS global business line. 

As a leader in MEP and Facility Management in North America, EQUANS North America is made up of a group of companies that are leaders in mechanical and electrical construction, industrial and energy infrastructure, and building services across North America. The entities that make up EQUANS North America include a collaborative group of commercial infrastructure experts that support clients to optimize their energy use and efficiently run their facilities. With offices across the U.S. and Canada, our organization offers a rare combination of wide territorial reach and proven local expertise.

Data Center

Commercial Real Estate

Property Management

Construction

Donnelly Mechanical Corporation

Dino Mangione

Kaitlin Simensky

Daniel Marchione

Michael Nousios

Marty Cunningham

John Fallon

Tiziano Sartori

Demetri Zhsimatos

Caterina Asaro

Leadership Team

Service Team

Construction and Safety Team

Project Management

Administrative and Operational Support

Human Resources

HVAC and Mechanical Team

Teams at Donnelly Mechanical Corporation