 Weather Bureau, the U.S. Air Force, and the U.S. Navy.In 1961 he accepted an offer to work at the National Center for Atmospheric Research (NCAR) in Boulder, Colorado, where his research focused on the general circulation of the atmosphere.Moving to the University of Michigan in 1963, he set up the meteorology department that later expanded to include oceanography and aeronomy, remaining there for ten years and building the department into a center for research in dynamical meteorology and the general circulation of the atmosphere.