Jeff Crusey is the founder of IceNine, a transatlantic early-stage fund built for the new industrial renaissance. He is known for backing frontier teams at the moment of ignition. In space systems, defense, advanced manufacturing, and the hard technologies that strengthen national capability. His track record includes early investments in companies like Castelion, True Anomaly, and Xona Space Systems, and he works shoulder-to-shoulder with founders from day zero, helping them navigate technical strategy, first customers, and the path from prototype to production. Across the U.S. and Europe, Jeff has become a trusted partner for builders tackling the most difficult problems of our time.