Thomas J. Allen, SM ’63, PhD ’66, a beloved member of the MIT Sloan community for more than half a century, died November 13 after a brief illness. He was 89.

Lecturer, Global Economics and Management (GEM).

David J. McGrath jr (1959) Professor of Management and Innovation, Professor, Work and Organization Studies

Nanyang Technological University Professor of Operations Research, Professor, Operations Research

Lecturer, Global Economics and Management

Senior Lecturer in Operations Research and Statistics

Jay W. Forrester Professor of Management, Professor, System Dynamics and Engineering Systems

E. Pennell Brooks (1917) Professor in Management, Professor, Operations Research

Theresa Seley Professor in Management Science, Professor, Operations Research

Lecturer, Global Economics and Management