For many years, Drucker maintained parallel careers in writing, teaching, and consulting. Boards of Directors and BeyondMany of Peter Drucker’s professional associates were adept at parallel careers. Eyes Wide OpenWhile there are undeniable benefits in parallel careers, it’s best to have your eyes wide open. Consider whether or not parallel careers could dilute your strength by spreading your time and resources too thin. Conclusion: A Look AheadTaking on parallel careers can also be a way of previewing your life in the years ahead.