John Hollenbach is the Managing Partner and Founder of Blue Diamond Capital, LLC, an investment firm focused on small and middle market private companies. Hollenbach also serves as an Investor and Advisor to the CEO at Cemalt, LLC, which specializes in environmentally-friendly geopolymer cement. Additionally, Hollenbach holds board positions at Decisiv, Inc. and Protochips, and has advised the executive management team at Decisiv on strategic matters. As Chairman of the Board at Rieke Metals, LLC, Hollenbach oversees a leading manufacturer of organozinc halides and fine chemicals. Hollenbach’s past roles include Executive Chairman at Reliable Biopharmaceutical LLC and Vice President & General Manager at Doe & Ingalls, as well as President & CEO at the same company prior to its acquisition by Thermo Fisher. Hollenbach holds an MBA in Finance and a BS in Chemistry from the University of North Carolina Wilmington, along with executive education credentials from The Tuck School of Business at Dartmouth.
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