David J. Malan is Gordon McKay Professor of the Practice of Computer Science at Harvard University in the School of Engineering and Applied Sciences as well as a Member of the Faculty of Education in the Graduate School of Education and an Executive Fellow at Harvard Business School. He teaches Computer Science 50, otherwise known as CS50, which is among Harvard University’s largest courses, one of Yale University’s largest courses, and edX’s largest MOOC, with over 4M registrants. He also teaches at Harvard Business School, Harvard Law School, Harvard Extension School, and Harvard Summer School. All of his courses are freely available as OpenCourseWare.

While on sabbatical, he also spends part of his time with GitHub as a Professor in Residence.


  • Ph.D., Computer Science, 2007
    Harvard University
  • S.M., Computer Science, 2004
    Harvard University
  • A.B., Computer Science, 1999
    Harvard University


  • cybersecurity
  • digital forensics
  • botnets
  • computer science education
  • distance learning
  • collaborative learning
  • computer-assisted instruction