As Chief Architect in High-Performance Computing and Artificial Intelligence at CTG Federal, my role is to help the company grow into emerging HPC and AI markets. I work with the entire CTG Federal team to blend my background in building, operating and maintaining large scale supercomputing environments with CTG Federal's highly regarded experience in enterprise computing systems and software to build hardened infrastructure to meet today's fast evolving requirement around HPC and AI.I have joined CTG Federal after more than 35 years at NASA, where I was most recently the CTO and previously Chief Architect/Supercomputing Systems Lead in the NAS Division. Over that time I developed and operated numerous supercomputing systems, mass storage systems and high-speed networks including Columbia (#2 top500) and Pleiades (#3 top500), which were among the world's most powerful computers at the time of their launch.The NAS (www.nas.nssa.gov) is a highly visible and well known program having broad national impact representing the United States commitment and leadership to Human Spaceflight, Planetary Science, Astro Physics, Earth Science, Heliophysics, Aeronautics, and the Search for Life elsewhere.I am honored and proud to have been a part of the "NAS" from nearly the beginning and to have been able to support these science and engineering efforts broadly with computing resources as well as to have been involved in many focussed projects where we developed capabilities taylored to specific use case needs. Our success came from seizing the opportunity to pull together diverse and dedicated teams of brilliant, highly motivated people who spanned industry, academia, and government. They were the best of us.Our approach was to run these systems over an extended service life, making numerous upgrades to enhance and extend their operational lifetime. We built these systems in an environment with scarce and often uncertain capitalization funds to maximize NASA's ROI - you can find historical full cost data docmented here: https://hec.nasa.gov/user/policies/sbus.html.For example, Pleiades was expanded and upgraded over 26 times and maintained a Top 20 ranking in the Top500 longer than any other system (9 years) and even received recognition of this from the Top500 committee. During that time we lived with every decision in NASA's largest and most demanding operational environment - 24x7x365.