"Joining the PremiStar family of companies will provide us with the resources, expertise, and investment needed to grow our business," said Randy Staab, president of MSI, who will continue to lead the business. "Our employees are excited about the opportunities this will enable for advancing their careers and expanding the services we provide to customers."

"Randy Staab and his team have a stellar reputation and are relentless about anticipating and meeting the needs of their customers," said Joe Kirmser, CEO of PremiStar. "We are proud to welcome the MSI team of all-stars to our family of companies and look forward to working together to build an even brighter future for employees and customers."

Mechanical Service Inc. is the 20th acquisition for PremiStar since 2019. PremiStar serves critical environments in the commercial and industrial market spaces by focusing on HVAC, plumbing, and building automation services and solutions. PremiStar is actively expanding the services it provides within the building envelope and is doing so through both organic growth and acquisitions. PremiStar, formerly Reedy Industries, was founded in 1930 and is headquartered in Deerfield, Illinois, just outside Chicago.