365 Service Partners is a privately held investment and operating platform focused on building leading businesses across HVAC, plumbing, mechanical services, and industry-supporting technology.

We partner with and operate a growing portfolio of companies spanning commercial and residential service, installation, maintenance, sales, and parts distribution, supported by licensed HVAC and plumbing professionals, experienced field teams, and a staff of engineers and technical solutions providers. Our businesses serve complex and mission-critical commercial and institutional environments, alongside residential markets, with a focus on delivering reliable, high-performance systems and long-term customer value. In parallel, we are developing AI-driven tools to support and modernize the trades.

Our platform brings together over a century of combined operating history across our companies, with deep roots in Connecticut, Western Massachusetts, and Greater Boston. We combine disciplined operational strategy, hands-on leadership, and scalable systems with a strong commitment to the people who make our businesses successful. We work alongside proven management teams to drive growth, improve performance, and build enduring companies that deliver exceptional service to customers and partners.

At our core, we are a culture-driven, team-oriented organization. We believe long-term success starts with investing in people – creating an environment where individuals are supported, heard, and empowered to grow. We prioritize doing the right thing for our teams and our customers, holding ourselves to high standards of integrity, performance, and collaboration.

We partner with business owners who care deeply about their people, their customers, and the legacy they have built – providing the resources, structure, and strategic support to help take their organizations to the next level. For our operating companies, we serve as a committed, value-added partner focused on long-term success. And for those joining our team, we offer the opportunity to be part of a growing platform where contributions matter, perspectives are valued, and there is meaningful exposure to all aspects of building and scaling great businesses.