I began teaching history in independent secondary schools in September,1958, at Wyoming Seminary, a co-educational boarding and day school in Kingston, Pennsylvania. I followed that with Saint Mary's Hall, a boarding and day school for young women in San Antonio, Texas, where I was also department head. For the final thirty-four years I was teaching at Emma Willard School, an independent secondary boarding and day school for young women in Troy, New York. I retired in June, 2000.

I began by teaching United States history on a twelfth grade level. I designed AP courses both in U.S. History and European. I then spread out to area studies. The passion of my last two decades has been world history.

I am currently active in the World History Association and the World Federalist Association, as well as a number of professional historical and teaching listservs. My wife and I both serve as volunteer docents at the museum in the Indian Pueblo Cultural Center here in Albuquerque.