Founded on Integrity. Driven by Excellence.

We are a family of innovative engineers and specialty contractors under one roof — dedicated to supporting our clients as they transform lives around the world.

Hart Engineering

General and Mechanical Contractor for the Pharmaceutical, Biotech, Process and Water/Waste Water industries

Hart Design Group

Multi Discipline Engineering, Architectural and Project Management Services for the Pharmaceutical, Biotech and Process industries

Hart Passivation

Specialized Passivation and Chemical Cleaning Processes for Pharmaceutical, Biotech and Industrial clientele


For over 75 years, we continue to deliver our expertise through the design, build and maintenance of all projects, while sustaining the highest performance in quality, safety and integrity for the industries and clients we have the privilege to serve.

We realize excellence, not only in our company culture, but in how our work is perceived around the world.

Ouisa Project

Alnylam Pharmaceuticals (Norton, MA)

Hart brought expertise from all three of its companies to the Alnylam Pharmaceuticals’, Ouisa Project. With a newly licensed class of innovative RNAi medicines, Alnylam required the design and construction of a drug manufacturing and cGMP warehouse facility.


Cytiva (Marlborough, MA )

Hart Companies recently completed a turnkey design- build project for Cytiva with twenty-one new state-of- the-art “flex” labs at their Results Way, Marlborough MA headquarters, and at their new Shrewsbury MA facility.

Sectors Served

Pharmaceutical & Biotechnology

For decades, Hart has reliably applied its innovation and specialized skill set to the Pharmaceutical and Biotech Industries.  Hart has extensive experience in the design, construction and passivation of new facilities, as well as upgrades and …

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Specialty Chemical

Hart’s technical skills and focus are showcased through decades of complex projects in the Specialty Chemical Industry.  The Engineers and Designers have command of a wide range of Unit Operations, Operating Conditions and Control Systems.  The …

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Hart is well versed in the design and building requirements unique to Microelectronic facilities, often classified by building code as hazardous occupancy facilities. Strict seismic analysis and designs with code importance factors of 1.25 are used …

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