 He also directed the expansion of the NOAA Corps training program and arranged for it to be located at the United States Merchant Marine Academy in Kings Point, New York.After over ten years as NOAA Corps director, Nygren retired on 1 January 1981.Nygren was a prolific photographer during his Coast and Geodetic Survey Corps, ESSA Corps, and NOAA Corps career, and the NOAA Photo Library includes many photographs credited to him.