← Back to PeopleJSFounderJack SteinCo-founder at CathedralFormer DOGE employee co-founding Cathedral defense AI startup for military cybersecurity.1Mentions1Articles1OutletsCompanies CoveredAndreessen Horowitz1Anthropic1Cathedral1Department of Government Efficiency1Sequoia Capital1SpaceX1ArticlesMost recent firstMentioned InReferenced in coverageCathedral raised $160Mpulse2.commixedJul 31, 2026“Former DOGE employee co-founding Cathedral defense AI startup for military cybersecurity.”