Complex sentence: In 1964, he joined the Irish Department of Foreign Affairs and in 1965 was assigned to the United States, initially to Boston as vice-counsel and later New York as deputy counsel general; during this period his wife Caitríona taught French and Mathematics in the South Bronx.
Split into simpler sentences: In 1964, he joined the Irish Department of Foreign Affairs and in 1965 was assigned to the United States, initially to Boston as vice-counsel and later New York as deputy counsel general. During this period his wife Caitríona taught French and mathematics in the South Bronx.