Don began his career at ORNL over 30 years ago initially supporting systems that spanned the Unix realm such as Sun, SGI, Digital and IBM. After a stint supporting the ESnet Internet connections at ORNL, he has spent the last 20 years in HPC and is currently the group leader for the HPC Scalable Systems Group and the systems technical lead for the Summit supercomputer. He has been the systems technical lead for several Top500 #1 systems over the past decade including Jaguar, Titan, and Summit.


Tennessee Technological University
Computer Science
Bachelor of Science (B.S.)

R&D Activities Contributions

Big PanDA Workflow Management on Titan for High Energy and Nuclear Physics and for Future Extreme Scale Scientific Applications - This project will provide an important model for future exascale computing, increasing the coherence between the technology base used for high-performance computing and that used…

HPC Systems Scheduling Improvements - Resource selection can have profound impacts on the performance and reliability of applications running on the supercomputer. On Titan, there are on going efforts to…


2008 — ACM Gordon Bell Prize

1992 — Martin Marietta Energy Systems Awards Night Technical Achievement