Fundraising Fox
Green Flag
Venture capitalActively deployingLos Angeles · Seed–Series A · 13 people tracked
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Investment thesis
Green Flag invests in battle-tested founders building dual-use products across defense, AI, and cyber. It emphasizes technology readiness (TRL 5 and above) over traditional stage labels, and looks for defensible IP, Western-ready teams, dual-use designs that scale beyond defense into civil and commercial markets, front-line soldier endorsement, and a mapped exit path into EU and U.S. procurement. Every portfolio company is domiciled outside Ukraine before investment to ensure international law and IP protection. The fund structures each deal for a Western exit, with strategic M&A as the base case, and supports founders with business development, buyer introductions, an expert network, and follow-on financing.
Source: firm website, verified Oct 24, 2026.
Team · 13 people
from the firm's website
Brings 15 years of experience in tech and finance in Kyiv; coordinated Ukraine's National Startup Fund and advised the Finance Minister, with 12 years in private wealth at UBS and Merrill Lynch.
Founder and CEO of Nisos (Series C) and board director at Swarmer (Nasdaq: SWMR); previously a U.S. intelligence officer for a decade and an attorney.
An investor-operator and CFO across buy-and-builds, with a background in investment banking at J.P. Morgan and private equity at Gryphon and Tin Goose, plus a decade in fund structuring, operations, and diligence.
Co-founded the U.S. Defense Innovation Unit.
CIO of a Stockholm private investment office; former CB90 commander in the Swedish Amphibious Corps and a defense columnist for Affarsvarlden.
An Atlantic Council Defense Fellow and family office CIO.
Led NASA's Space Communications and Navigation (SCaN) program and was formerly the Army's Assured PNT chief.
Twice served as a defense air attaché to Ukraine.
Former CIA operations officer and defense tech operator/investor.
A former Obama administration appointee and DoD counterterrorism leader.
Led security at multiple public companies.
Built and led the U.S. Air Force Electronic Warfare program.
PhD-holder who built and led the U.S. Air Force Electronic Warfare program.
What they invest in
from 5 of 18 portfolio companiesDefense Tech ×4Robotics ×4Deep Tech ×3Hardware ×3AI & Machine Learning ×2Enterprise Software ×2IoT ×1
HQs:Ukraine×2Estonia×1United States×1
Investments · 18 tracked
founders shown can be your intro pathSwarmer builds AI-driven autonomy software for drones, providing autonomous navigation, real-time combat data, and swarm collaboration for military units.
AI & Machine LearningDefense TechRoboticsAustin, US
Serhii Kupriienko(Executive Officer, Director)inAlexander Fink(Executive Officer, Director)
BoardPhilip Wagenheim(Director)
Board seatJustin Zeefe· per SEC Form D
Co-investorsRadius Capital VenturesNetwork VC
Babayte develops onboard AI for civilian UAVs that keeps drones operating in degraded conditions with failing sensors, using multi-sensor fusion and sub-53ms reaction times.
AI & Machine LearningDeep TechRobotics
PartnerJustin Zeefe· solo GP
Portable, cost-effective products for detecting, tracking, jamming, and cataloging enemy UAS.
PartnerJustin Zeefe· solo GP
Teletactica develops communication systems that integrate control links, video, and data exchange into unified connectivity infrastructure for defense and industrial applications.
Deep TechDefense TechEnterprise SoftwareHardwareIoTRoboticsLatvia, EE
PartnerJustin Zeefe· solo GP
Other
Tracked investments with no reachable website or further public details — typically companies that wound down, renamed, or were absorbed.
CalibredefenceClaymoreClaymore IndustriesGutseeGutSee HealthItarenaJanesKaradagMaXon SystemsNew DefenseTheaircurrentUnited24Media
Portfolio news
latest coverage across their companies
Swarmer · thesaasnews.com · Aug 17, 2026
Teletactica · finsmes.com · Jul 21, 2025
Frequently asked questions
- How many investments has Green Flag made?
- Green Flag has 18 tracked investments, including 1 dated in the last 24 months.
- What stage does Green Flag invest at?
- Green Flag invests at the Seed, Series A stages.
- What sectors does Green Flag focus on?
- Green Flag focuses on AI & Machine Learning, Cybersecurity, Deep Tech, Defense Tech, Hardware, Robotics.
- Where is Green Flag located?
- Green Flag is headquartered in Los Angeles, US.
Media · Podcasts & interviews
featuring the teamDeborah Fairlamb — an American in Kyiv and co-founder of ...
Joe Lindsley · Deborah Fairlamb · facebook.com
Deborah Fairlamb — an American in Kyiv and co-founder of ...
JP Lindsley · Deborah Fairlamb · instagram.com
Justin Zeefe - Wise words from my cofounder Deborah!
Justin Zeefe · Justin Zeefe · linkedin.com
Deborah Fairlamb, an American in Kyiv, is co-founder of Green ...
Joe Lindsley · Deborah Fairlamb · facebook.com
Deborah Fairlamb, an American in Kyiv, is co-founder of Green ...
JP Lindsley · Deborah Fairlamb · instagram.com
Deborah Fairlamb, an American in Kyiv, is co-founder of Green ...
JP Lindsley · Deborah Fairlamb · instagram.com
Images
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