After five years, Toftoy accepted a teaching position at West Point. In the mid-thirties, Toftoy attended battery school at Fort Monroe. Now a captain, Toftoy was assigned to the Pacific Division's mine battery. It was during his time with the mine battery that Toftoy had his first research and development project designing mines that could recognize friendly vessels.
During World War II, Colonel Toftoy was assigned to Army Intelligence in Europe where he worked to acquire German technology. When American troops discovered a V-2 factory, Toftoy was able to secure plans for the rocket and was also instrumental in acquiring the teams of the German scientist who had helped developed the V-2.