Philip Johnston is Co-Founder and CEO of Starcloud, which builds data centres in space to address the AI energy bottleneck. Starcloud recently became the first entity to launch and operate an Nvidia H100 GPU (AI chip) in space, 100x more powerful GPU compute than has been on orbit before. Starcloud was also recently the first entity to train an LLM in space and to run Gemini in space. Starcloud became the fastest YC unicorn in March 2026. Philip is a second-time founder who previously spent time at McKinsey and Company working on satellite projects for national space agencies. He has an MPA in National Security and Technology from Harvard University, an MBA from Wharton, an MA in Applied Mathematics and Theoretical Physics from Columbia University, and he is a CFA Charterholder.