Critical Services Group

Critical Services Group is a private equity firm established in 2025, headquartered in Boston, Massachusetts. The firm focuses on investing in founder-led, mission-critical service companies that are essential to keeping industries moving and modern life running. Their investment strategy centers on acquiring and growing businesses in specific sectors, including aerospace and Part 145 MROs (Maintenance, Repair, and Overhaul) for business jets, elevator maintenance services, and internet service providers (ISPs) and managed service providers (MSPs) for network infrastructure.

The firm's approach is built on lasting partnerships, emphasizing trust, expertise, and a shared vision. Critical Services Group operates with a permanent capital model, meaning they do not have a fund life or forced sale deadlines, allowing them to hold companies indefinitely and support long-term growth. They position themselves as operators and builders rather than financial engineers, aiming to understand the intricacies of starting, scaling, and sustaining businesses.

Critical Services Group has not yet made any reported investments. The firm is actively seeking new investment opportunities within its core focus areas, targeting lower-middle-market B2B services companies. They aim to partner with founders, preserving company culture while providing the necessary structure and capital for sustainable expansion, including organic growth and strategic add-on acquisitions.

The team at Critical Services Group brings experience in service businesses, with a focus on managing distributed workforces, safeguarding quality, and fostering long-term customer relationships. Key team members include Dustin Zacharias, Founder & Managing Partner, Alex Lesher, Principal, Tate Harms, Analyst, and Hunter Ballard, VP of Business Development. The firm also leverages an industry board with expertise from sectors like telecom, aviation MRO, and elevator consulting, including José Stella, Brian Campbell, Vincent Giudice, and Michael Caputa.