A Chat with Thorsten 'Thor' Claus: A Wild Journey of Engineering, Play, Technology, High-Stakes Investing, and Generational Stewardship.

This week, Stephen Ibaraki has an exclusive interview with Thorsten "Thor" Claus.

Thorsten "Thor" Claus invests in defense, security, and national resilience - leading direct investments in North American and European dual-use startups and committing to specialized emerging managers. His conviction is simple: in this sector, the failure mode is not a pivot but a strategic and human liability. He backs technologies that must work the first time, every time.

Thor began as an engineer. He spent his early career in software and network engineering, spearheading frontier product and technology design for governments, defense agencies, and global communications players. That grounding - building systems that have to hold under load - still shapes how he underwrites.

He has since built institutional investment platforms more than once. At Northgate Capital, a $4.8B manager, he created the direct co-investment product and weighed every deal across the platform from the firm-wide investment committee. As one of five founding partners of the NATO Innovation Fund, he helped stand up a $1.13B fund across Amsterdam, London, and Luxembourg, built its deep-tech thesis, and restructured capital formation in live deals to remove adversarial stakeholders from defense-sensitive cap tables. The work helped establish defense as an investable asset class in Europe.

His personal record is top-decile venture returns and distributions, most of it deep tech, with board seats across more than twenty companies. He has also taught venture and dual-use innovation to over 400 graduate students at UC Berkeley and Northeastern.

One fault line runs through all of it: the cross-Atlantic gap between where critical technology gets built and where allied capital sits. Thor works to close it - pairing North American deal access with European institutional fluency, in service of European sovereignty and the resilience of open societies.

He lives in the Bay Area. Most days he is on a Berkeley machine shop floor building historic race engines and CNC parts for aerospace and defense. Dry weekends, he is downhill skateboarding the hills. Both teach the same lesson: tolerances are not negotiable.