threat-replication
(2)
Long Wall
Long Wall is a Long Beach, California defense manufacturer building cost-effective, mass-producible missile defense systems. Founded in 2017 as the rocket startup ABL Space Systems, it rebranded to Long Wall in February 2025 and pivoted from commercial satellite launch to defense, repurposing years of launch-vehicle engineering into interceptors, target rockets, and deployable ground infrastructure. Its lineup includes Cyclops, a surface-launched exoatmospheric interceptor; RSX, a low-cost liquid booster for flight testing and threat replication; and Ironwood, rapidly deployable ground support equipment. The company's thesis is that modern threats - hypersonic weapons, growing nuclear arsenals, and raid sizes in the hundreds - have outrun the price and production volume of legacy interceptors, so defense needs magazine depth measured in thousands, not dozens.
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.