Shah founded QuSpin, which commercialised the compact zero-field (SERF) OPM (QZFM) that underpins most wearable OPM-MEG systems worldwide; he continues to advance sensor sensitivity, dynamic range and multi-axis operation. This vapour-phase approach reaches femto-to-picotesla sensitivities complementary to NV-center diamond ensemble quantum sensors (DEER, nano-NMR, T1 relaxometry) that operate near the pT/sqrt(Hz) regime.