Founder & CEO

Blake Rosengren is the founder of Rose Branch LLC, an aerospace and defense–focused company centered on solving high-consequence engineering and operational problems in regulated environments.

Blake brings 17+ years of experience across aerospace mechanisms, electric vehicle systems, and advanced battery and power-system development, with a career spanning design, qualification, and production of high-reliability hardware. His background includes senior operational leadership across complex defense and space programs, overseeing cross-functional engineering, manufacturing, supply chain, and quality teams.

He is recognized for deep expertise in battery architectures, energy storage systems, and power integration, with a practical emphasis on safety, qualification rigor, manufacturability, and lifecycle performance. His work consistently bridges engineering and operations—ensuring designs are not only technically sound, but executable at scale.

Through Rose Branch LLC, Blake focuses on rapid-cycle development and fast-turn prototype solutions, enabling partners to move from concept to validated hardware quickly and responsibly. The company operates with a disciplined execution model that prioritizes speed without compromising reliability, compliance, or quality.

Blake works quietly with select partners requiring precision, accountability, and accelerated delivery in environments where outcomes matter and failure is not an acceptable learning mode.

Blake is based in Southern California.