Jerry Fiorentino, CEO
Jerry Fiorentino is the founder and Chief Executive Officer of Tolerance Tool, establishing the company in 1980 with a conviction that American manufacturing is foundational to national strength. For over four decades, he has led the firm at the intersection of precision engineering and mission-critical production, delivering complex components and systems across aerospace, national defense, and other high-stakes industries. Jerry’s philosophy is rooted in the belief that manufacturing is not just an economic function, but a strategic pillar of national security and resilience. Under his leadership, Tolerance Tool has remained independent, disciplined, and deeply committed to advancing the capabilities of the American industrial base.
Chris Xiromeritis, COO
Chris Xiromeritis serves as Chief Operating Officer at Tolerance Tool, where he leads operational strategy, process engineering, and execution across mission-critical programs. With decades of experience spanning Stellantis and Ford Motor Company, Chris brings deep expertise in quality systems, advanced manufacturing workflows, and large-scale program management. A Lean Six Sigma Black Belt, he specializes in translating complex engineering challenges into disciplined, high-performance operations. Chris has driven enterprise-wide transformations in data systems, reporting infrastructure, and process optimization, delivering measurable gains in efficiency, cost, and reliability. At Tolerance Tool, he ensures every system, process, and part performs to the standard the mission demands.