Zellerfeld, the German 3D-printed footwear manufacturer, is bolstering its leadership team as it continues to expand globally.
On Thursday, the company named Matthew DeNezza as chief financial officer and Sean McCartney as chief operating officer. DeNezza and McCartney will work closely with co-founder and chief executive officer Cornelius Schmitt to “align financial discipline with operational execution,” Zellerfeld said.
“Matt and Sean each bring critical experience as Zellerfeld enters its next phase of growth,” Schmitt said in a statement. “Together, they strengthen our ability to execute with discipline as we make the physical digital, starting with footwear, bring advanced manufacturing back to the United States, and build a durable global platform for the future.”
Most recently, DeNezza served as chief financial officer of Crusoe, where he helped transform and grow the business into a multi-billion-dollar AI infrastructure and data center platform. Earlier in his career, DeNezza held CFO roles through both IPO and major expansion efforts and spent over a decade in investment banking advising infrastructure and energy companies on mergers and acquisitions and complex capital markets transactions.
DeNezza noted on Thursday that he is “excited” to join the team at a moment when the company is rapidly expanding. “The opportunity to help grow the business responsibly, invest in U.S. manufacturing, and support partners who are reimagining not only what footwear, but also what other physical products can be, is incredibly compelling,” he said.
As for McCartney, he previously served as chief supply chain officer at StockX. Earlier in his career, he held senior leadership roles at Chico’s FAS and Radial, overseeing multi-billion-dollar e-commerce and omnichannel operations.
“Zellerfeld represents a once-in-a-generation opportunity to rethink how physical products are made and delivered,” McCartney added. “After spending my career operating footwear, retail, and e-commerce platforms within legacy supply chains, it was clear that Zellerfeld’s model is fundamentally different. The ability to produce locally, on demand, and at scale has the potential to reshape manufacturing and commerce, and I’m excited to help grow the platform as demand accelerates.”
The new appointments come after Zellerfeld recently opened a 3D-printed footwear production hub in Texas. The move aims to reinforce the company’s commitment to reshoring manufacturing and building a fully automated, waste-free production model designed for on-demand, localized production, Zellerfeld said.

