Scaling quantum sensors from lab prototypes to high-volume manufacturing requires bridging the gap between precision quantum physics and semiconductor fabrication. At Mesa Quantum, we are developing a wafer-level manufacturing process to enable cost-effective, chip-scale quantum sensors for Position, Navigation, and Timing (PNT) applications. This involves integrating quantum materials with CMOS-compatible techniques, optimizing vacuum packaging, and ensuring reproducibility at scale. Collaborating with MEMS foundries is critical to achieving the precision and scalability needed for commercial deployment. This talk will explore key challenges, process innovations, and the role of foundries in advancing quantum sensor manufacturing for real-world applications.