· Professor of Electrical Engineering, Massachusetts Institute of Technology1964–
· Researcher and Educator, Massachusetts Institute of Technology1964–
· Professor of Electrical Engineering and Computer Science, Massachusetts Institute of Technology (MIT)1964–
· Researcher in Artificial Intelligence and Computer Science, Massachusetts Institute of Technology (MIT)1964–
· Professor, MIT CSAIL1964–
· Researcher, Medical Vision Group, MIT CSAIL1964–
· Member of Theory of Distributed Systems Group, Massachusetts Institute of Technology (MIT)