Since 2004, Mainstay has been on a mission to revolutionize IT, information security, and IT engineering services for small and mid-sized businesses across New England. We operate with the philosophy: "We give more than we get." Success for us is measured by the positive impact on every life we touch, emphasizing value creation for our client-partners, community, environment, and our team. 

As of 2025, Mainstay is proud to have a team of just over 100 team members, numerous awards, and a debt-free company with no outside ownership. Our core values, including integrity above all else, team-driven, World-Class Professionalism, uncompromising commitment to Excellence, forward-thinking and Holistic approach, and Passion in all we do - provide the drive for our goal to become a 100-year company.