In 1984 he joined Thinking Machines Corporation where he led the Knowledge Representation and Natural Language (KRNL) group.
There, his access to massively parallel supercomputers enabled him to work on new methods for information retrieval involving comparisons to large amounts of data.
In addition to his dedication to the scientific community, he was an extremely devoted husband and father, and his wife and children traveled regularly with him to many conferences and professional engagements throughout his career.
Jeremy and wife Kathy had granddaughter Hannah in 2003, at which point "The Dude" became Waltz's nickname among family and friends.
David Waltz died in the University Medical Center at Princeton, New Jersey on March 22, 2012 from brain cancer; he was 68 years old.