We construct, renovate, or rehabilitate public facilities. We self-perform carpentry, sitework, concrete, roofing, windows, HVAC, sprinkler, plumbing, electrical, and other trades.

Furnish & Installation of Carpet, vinyl, wood, and ceramic tile materials.

Proto-Pac is an electronic contract manufacturer, with capabilities to assemble circuit boards with surface mount and through hole components as well as top level box build assemblies. Functional test, repair and trouble shooting service are available.

Full line distributor of electrical and lighting equipment with thirteen branches in Southern New England.

IT Consulting Services - Mainframe and client Server Databases including special emphasis in the Legacy Databases Model 204 and ADABAS. ERP Applications including Peoplesoft and SAP. Healthcare Financial applications consulting and staffing solutions.

Design and development of software solutions using a variety of Microsoft and other development technologies. Development training and mentoring.

Market offices supplies, janatorial/breakroom supplies, printing and forms management, promotional products and furniture

Manufacturer of DNA/RNA synthesis products.

ENGINEERING: CIVIL, ENVIRONMENTAL, GEOTECHNICAL AND STRUCTURAL. ENVIRONMENTAL SCIENCES: SITE ASSESSMENT & REMEDIATION, GEOPHYSICS AND PERMITTING SURVEYING. CONSTRUCTION MANAGEMENT: RESIDENT INSPECTION, MANPOWER PROJECTION, SCHEDULING AND COST ESTIMATING.

Precison machining, small & medium parts, aluminum, stainless steels, plastics. Electro-mechanical assemblies. JIT, Kan Ban.

Manufacturer of Precast Concrete Products, including: Manholes, box culvert, precast concrete buildings, septic tanks, cisterns, precast stairs, stormwater, utility products, vaults, pump stations, retaining walls, etc...

Industrial distribution company serving the surface preparation, abrasive blasting, and painting industries. Multiple-line stocking dstributor. Used equipment, rentals, service and support also provided.

Sales & Service extremity MRI systems

explosive detection equipment R & D temporary brachytherapy

Calderwood Consulting is a fire and life safety consulting firm with develops fire, emergency, evacuation and COOP plans for business and industry.

ceramic component manufacturer

Promotional products and events, embroidered goods, awards, computer graphics

Lilliputian Systems Inc. is the developer of a small solid oxide fuel cell system. The system, when fully developed, promises to deliver 5X to 10X the run-time for portable devices like cell phones, PDAs and digital cameras.

Developer and manufacturer of electron beam technologies and applications, including polymerization, sterilization, and volatile organic compound destruction.

Software Application Security Testing and Products.

Supply Office Products

Principal Technology Group provides businesses??ith a reliable, high-quality alternative resources for software development and support. We offer a very high level of practical experience, know-how, contacts, and confidentiality.

Landscaping & Snow Removal services

Overfill Prevention

MACKAY CONSTRUCTION SERVICES, INC.