Complex sentence: He served as the Director General of the Jewish National Fund from 1987 until 1992, and as a member of the board of directors of Israel Aerospace Industries between 1988 and 1991 and chairman of the board between 1999 and 2003.
Split into simpler sentences: He served as the Director General of the Jewish National Fund from 1987 until 1992. He was a member of the board of directors of Israel Aerospace Industries between 1988 and 1991 and chairman of the board between 1999 and 2003.