Caleb Freeman is an Associate Technical Fellow at Sierra Nevada Corporation (SNC), where he leads the company's programs and teams in the adoption of Government Reference Architectures (GRAs) and the implementation of SNC's MOSA strategy. With over 21 years in the aerospace and defense industry, his experience spans electrical engineering, systems engineering, flight test, and chief engineering roles in the integration and modification of aircraft. At MOSA 2026, he shares an integrator's perspective on the practical realities of MOSA implementation.