JM

John Mastal

VC

Co-Founder & Partner, Marlinspike Partners

Army Reserve officer turned defense tech fund strategist

Arlington, VA
SeedSeries A
DefenseDeep TechAISecurityRobotics

Background

John Mastal is a Co-Founder and Partner at Marlinspike Partners, heading strategy and capital markets. He has over 15 years of experience in family office development, finance, and fundraising in ultra-high-net-worth and institutional markets. He served as an Army Reserve Officer for eight years early in his career and was previously VP of Investor Relations and Leasing at Weller Development Company, the real estate arm of Under Armour founder Kevin Plank. He graduated from the University of Richmond.

Investment Focus

Stages

SeedSeries A

Sectors

DefenseDeep TechAISecurityRobotics

Based in: Arlington, VA (North America)

Last updated: Jun 11, 2026