Justin Zeefe

Founder‑operator who translates government tradecraft into commercial intelligence products: Zeefe co‑founded Nisos in 2015 after ~10 years as an operations officer in the U.S. intelligence community. At Nisos he led the company from seed through growth phases, building a managed‑intelligence service that blends OSINT, technical cyber analysis, and human collection to produce timely, actionable intelligence for enterprise customers. nisos+1

Venture investor focused on defense, cyber, and Ukrainian dual‑use tech: In 2023 Zeefe co‑founded Green Flag Ventures to invest in battlefield‑validated dual‑use startups from Ukraine and the broader defense tech ecosystem, and he has led seed investments (and portfolio support) into companies such as Swarmer, Kara Dag, HIMERA and AstraNav. greenflag+2

Bridges operational, legal, and go‑to‑market experience: Zeefe started his professional career practicing litigation at Williams & Connolly, spent a decade in government operations, then built and scaled a commercial intelligence firm—this mix gives him both domain credibility with national‑security stakeholders and practical experience packaging intelligence as a differentiated enterprise service. nisos+1

Public-facing convener and speaker in defense / dual‑use investment circles: Zeefe is active in investor networks and industry events (e.g., IT Arena), advocates for accelerating investment into Ukrainian defense innovation, and publicly represents GFV and its portfolio in media and conference panels. itarena+1