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 Appointed
deputy chief of the NAS Systems Division in August 1999, John
Ziebarth manages day-to-day operations of the NAS Facility, and
shares responsibility for strategic planning of the research and
operations of the division. Previously, Ziebarth was director
of NASA's Consolidated Supercomputing Management Office (CoSMO),
where he oversaw the high end computing strategy and investments
across NASA. During his 25-year career he has served as an associate
director at the National Center for Supercomputing Applications
(NCSA), done research in
computational fluid dynamics in industry and with research institutes,
and has taught undergraduate and graduate computer science, engineering,
and mathematics courses. He holds a Ph.D. in aerospace engineering
from Mississippi State University.
 As
chief of the NAS Engineering Branch, William W. (Bill) Thigpen oversees division
work that supports advanced systems development, network research, and NAS
workplace environments. Before joining the division management team in September
1999, he worked for Sterling Software Inc. at the NAS Facility, leading the
advanced systems development group and managing technical teams that provide
high-speed computing capabilities and services to NASA researchers. Thigpen
led the Y2K compliance effort for NASA Ames Research Center's Information
Sciences and Technology Directorate. His 17-year career supporting government
contracts includes software engineering and mission support management. He
holds a bachelor's degree in computer science from the University of Nebraska.
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