Alliance Mechanical

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Jason and Shaun Patnaude are the leaders in the industry after starting the company just six short years ago with 7 employees, they have now grown the company to over 70 employees and three locations.  Providing service to all of Vermont, Western NH to Plattsburgh NY. There seems to be no stopping them now.

Alliance Mechanical Inc, was founded on the basis of customer service. They are not the typical construction company that does service as a secondary focus. They are a service company that does construction to support their customer’s needs. 

Jason and Shaun Patnaude, two brothers who grew up with superior work ethics learned what it really means to treat clients with the utmost respect, listening to their needs and concerns while guiding them so they can get the most from their buildings equipment. With decades of knowledge between the two leaders and the exceptional staff supporting them they have created a force in the industry. 

Proactive Maintenance Agreements

Alliance Mechanical was founded on pro-active maintenance agreement program. The maintenance agreement is based on maintaining and repairing HVAC equipment before it creates an emergency. Making sure your equipment is working at its ultimate performance so it does not let you down during the hottest heat of the summer or the coldest of the winter times.

By working with and educating our customers on their HVAC equipment condition, they can better understand the equipment’s life expectancy. Being Proactive to their equipment’s life cycle can help them plan replacements and upgrades in an efficient and cost effective manner. 


Alliance Mechanical is very comfortable in their trade, Shaun and Jason have decades of experience and know exactly what they want their company to be. Shaun and Jason have also prided themselves on keeping their eyes on professionalism from clean vehicles to well-dressed employees it matters to not only be the best but look like the best.


Try to drive around Vermont and not see an Alliance Mechanical vehicle, wave at them, say Hello.  Alliance Mechanical is greater than competitors because they care about their employees, just ask one of them.  It’s a source of pride with Jason and Shaun also to be different and make sure the employees have a voice and care about the product or service they provide. “We have two customers to make happy our internal customers (employees) and our external customers (clients)”. If we keep our employees happy then they in turn provide the best service to our customers.

Expanding Services

Alliance Mechanical has a rock solid foundation and the business model that has a proven track record of success in mechanical service. 

We are now expanding that model into building automation, industrial combustion and precision cooling.

We provide service, installation and integration for Schneider Controls, Johnson FX Controls and Alerton Controls. 

Our Industrial Combustion division allows us to service and support our large manufacturing and process customers with factory authorized service technicians that can keep their operations on line. 

We all know that computers are not just a thing of the future but a reality. With computers
getting more powerful and IT rooms getting larger to accommodate more hardware our Precision cooling division can keep your machines running and your business on line. Whether it’s a small IT closet to a large main frame data center we have the expertise to install and service it. 

Customer Service 

Alliance Mechanical was conceived by the notion of customer service is King, and this is the foundation that this company has lived by.

Clients are first class with Alliance Mechanical, they can be assured that their voice will be heard. The staff is trained with the newest technologies and uses the best equipment on the market.

Communicating with our customers helps us to understand their needs, calling them back in a timely fashion, showing up on time and listening to them so we can resolve their issues.

Providing solutions not excuses is what makes us a great company. 

Alliance Mechanical

6 David Drive, Essex Junction, VT 05453

1 Commercial Drive, West Lebanon, NH 03784

802-864-4000 |

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