He has pioneered new methods of using computer modeling in the fields of fracture mechanics, membrane dynamics and phase transformation behavior of matter.
He joined IBM in 1966 as a staff member at its Palo Alto Scientific Center.
During 1994, he held the Sandoval Vallarta Chair at the Universidad Autonoma Metropolitana in Mexico City.
He was elected the recipient of the Alexander von Humboldt Research Award for Senior Scientists.
Retiring from IBM in 2004, he joined Lawrence Livermore National Laboratory as a Senior Scientist and was named the Graham-Perdue Visiting Professor at The University of Georgia.