Over the last decade, I’ve watched private equity surge into the machining world — and I’ve seen firsthand how often the short-term flip-in-five-years strategy ends up hurting shops, people, customers, and entire supply chains. While the capital can help, the incentives often drive decisions that weaken the very businesses PE firms acquire. But every now and then, someone comes along with a model that stops you in your tracks because it actually makes sense for our industry.
That someone is Mark Hillenburg II, co-founder of Collective Manufacturing Group, a company built on a radically different vision: buy great machine shops and hold them forever. No flipping. No short-term targets. No cultural upheaval. Just long-term stewardship, disciplined investment, and a deep respect for the people who built these businesses in the first place.
In this conversation, Mark and I dig into his incredible journey — starting a tiny shop with his father in a 700-square-foot garage, learning machining the hard way, living through major turnarounds, scaling multi-site aerospace manufacturing, and ultimately becoming disillusioned with traditional PE models. His experiences shaped a philosophy that aligns closely with the heart of American manufacturing: protect the legacy, empower the people, and build a business that lasts.
We also talk about how his team is already reviving shuttered shops, empowering internal leaders, gaining trust from OEMs, and receiving deal flow from customers who don’t want their critical suppliers bought by traditional PE firms. If you care about the long-term health of the machining ecosystem, you’ll want to hear this one. Mark’s approach gives me real hope for where this industry can go.
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