Electric motors form the basis of most modern Naval vessels and submarine propulsion systems. Naval platforms require cost effective, power dense, highly efficient, resilient, low noise and reliable propulsion solutions. Permanent magnet motors (PMM) offer higher power density, higher efficiency, and lower noise than conventional induction motors. The permanent magnets require special consideration under temperature and shock load conditions and require analysis, design and validation to inform their suitability for the desired application. PMM are not a new technology and have been widely adopted in numerous applications and have a high technology readiness level. This paper looks at the simulation and tests carried out on a PMM to validate the magnets shock capability to meet typical Naval underwater shock requirements. PMM topologies will be presented, surface and embedded, noting specifically embedded magnets are inserted into the rotor laminations and bonded with epoxy resin to hold them in position. Finite element analysis carried out on the embedded permanent magnet motor and the motor geometry has been optimised to improve the shock capability of the magnets. Magnets were tested at various shock levels using a vertical drop test machine and their magnetic properties were checked after each test to confirm they can withstand the shock requirements while remaining magnetised. Additionally, a rotor segment was manufactured and tested on a shock table to validate the shock withstand capability of the magnets and the lamination. This paper will summarise the shock design and validation results for the PMM investigated.