Arthur Karell is a venture capital partner at First In who combines an unusually decorated front-line combat background as a Marine Corps infantry officer with Bronze Star recognition, Big Law training, and senior operating roles at high-growth defense and policy tech companies including FiscalNote, Anduril, and co-founding Seashell. He personally sourced and closed over $425M in strategic acquisitions at Anduril in under two years, giving him rare hands-on M&A experience at a flagship defense-tech unicorn before becoming a seed-stage investor focused on defense and dual-use technologies. Arthur Karell is a venture capital partner at First In who combines an unusually decorated front-line combat background as a Marine Corps infantry officer with Bronze Star recognition, Big Law training, and senior operating roles at high-growth defense and policy tech companies including FiscalNote, Anduril, and co-founding Seashell. He personally sourced and closed over $425M in strategic acquisitions at Anduril in under two years, giving him rare hands-on M&A experience at a flagship defense-tech unicorn before becoming a seed-stage investor focused on defense and dual-use technologies.