Dan Piemont

Dan Piemont is the co-founder and CEO of Long Wall, the Long Beach defense company formerly known as ABL Space Systems. An MIT physics and economics graduate who came to rocketry through Wall Street trading and venture capital rather than an engineering bench, he spent seven years building low-cost, containerized launch vehicles before pivoting the company in 2024-2025 toward mass-producible missile defense. Long Wall now develops the Cyclops exoatmospheric interceptor, RSX liquid boosters for threat replication, and Ironwood mobile ground systems, repurposing the hard-won technology of a launch startup that survived two failed orbital attempts into a bet on American homeland defense.