Interesting thing is, his place of work is not famous as compared to top US institutions (I am from outside US). But his educations says it
Ph.D. Computer Science, University of California at Berkeley, May 1997
.
M.S. Civil Engineering, Massachusetts Institute of Technology, August
1990.
B.S. Civil Engineering, Massachusetts Institute of Technology, June 19
89
This is not at all unusual, and I would be careful about thinking it has any predictive power.
It's extremely difficult to become a professor, so tenured or tenure-track professors at mediocre (but decent) schools often have degrees from big-name places.
Also, Olin College isn't even mediocre, just small. From what I understand it's pretty selective.
Ph.D. Computer Science, University of California at Berkeley, May 1997 . M.S. Civil Engineering, Massachusetts Institute of Technology, August 1990. B.S. Civil Engineering, Massachusetts Institute of Technology, June 19 89