Binswanger's doctoral dissertation, in the philosophy of biology, presented a new theory of the goal-directedness of living action, in opposition to the views of one of his dissertation advisers, Ernest Nagel. The dissertation was later published as 'The Biological Basis of Teleological Concepts'. He taught philosophy at CUNY's Hunter College from 1972 to 1979 and at other New York City schools as well as at the University of Texas, Austin for a semester in 2002. Since 1997, he has operated a fee-based email discussion group on Objectivism. Wikipedia*
On the C-SPAN Networks:
Harry Binswanger has one video in the C-SPAN Video Library; the first appearance was a 2002 Forum.