Stephen McNally is the Operations Manager for the National Center for Computational Sciences. In this role, he oversees the day-to-day activities of the multi-programmatic computing center. Stephen began working in high-performance computing (HPC) in 2009 as a Linux systems administrator supporting the Kraken supercomputer. Prior to HPC, Stephen served as an IT professional in the automotive and healthcare industries. He received business degrees, including an MBA from Tennessee Technological University in 2013. Stephen’s educational background in business coupled with his highly technical experience in HPC provide unique insight that is well-suited for managing the operations of a leadership computing facility.

Stephen serves as a guest lecturer for various classes in and around the greater Knoxville area. His primary speaking role is associated with the University of Tennessee, Knoxville course titled, “Introduction to Data Centers”. This course is taught primarily by data center experts from ORNL in partnership with the University of Tennessee, Knoxville. He teaches the first classes of the semester surrounding the strategy required in building, maintaining, and operating a data center.

Stephen enjoys serving in the local community and does so through various non-profit organizations, his church, and local government groups. In 2016, he began working with various economic development firms and organizations to ensure that Tennessee continues to stand tall as a national leader in economic development. With his civic duties, Stephen also participates in the IEEE and iMasons professional societies.


Carson-Newman University
Computer Information Systems
Bachelor of Science (B.S.)
Tennessee Technological University
Master of Business Administration (M.B.A.)

R&D Activities Contributions

Discovery and Curation of Publications from Scientific User Facilities - Scientific user facilities require an effective and efficient process to discover, verify, and curate publications resulting from user programs. No single data source or collection…

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…

Accelerated Data Analytics and Computing Institute (ADAC) - The Accelerated Data Analytics and Computing Institute has been established to explore potential future collaboration among UT-Battelle, LLC (UT-Battelle), the Swiss Federal Institute of Technology,…

Staff Activities

Event Coordination:


Second Workshop on the Changing Landscape in HPC Security

This workshop provided an arena for researchers and practitioners to share their advances in HPC security, to learn from one another, and to provide a vehicle for grassroots communication between the two communities regarding their respective data and theory needs.


XSEDE15 Logistics and Local Arrangements Co-chair

Co-chaired and organized all aspects of the conference logistics including audio visual needs, networking, security, event space provisioning, communications, social media, hotel arrangements, and registration.


2017 — ORNL Awards Night - Mission Support

2017 — ORNL Significant Event Award

2012 — ORNL Computing and Computational Sciences Distinguished Employee Award


2014 - M. R. Fahey, R. Budiardja, L. Crosby, S. McNally, “Deploying Darter – A Cray XC30 System,” Lecture Notes in Computer Science, J.M. Kunkel, T. Ludwig, and H.W. Meuer (Eds.): ISC 2014, LNCS 8488, pp. 430–439, Springer International Publishing Switzerland June 2014.

2013 - Michael Campfield, Stephen Taylor McNally, Michael Andrew Packard, Mike Pingleton, Tabitha K. Samuel, Thomas Maiden. The XSEDE Ticket System: From Concept to Implementation. In XSEDE’13 Proceedings of the Conference on Extreme Science and Engineering Discovery Environment: Gateway to Discovery. ACM, New York, NY, USA, Article 44. DOI=10.1145/2484762.2484792

2012 - Tabitha K. Samuel, Stephen McNally, and John Wynkoop. 2012. An analysis of GPU utilization trends on the Keeneland initial delivery system. In Proceedings of the 1st Conference of the Extreme Science and Engineering Discovery Environment: Bridging from the eXtreme to the campus and beyond (XSEDE '12). ACM, New York, NY, USA, Article 5 , 6 pages. DOI=10.1145/2335755.2335793

2011 - J.S. Vetter, R. Glassbrook, J. Dongarra, K. Schwan, B. Loftis, S. McNally, J. Meredith, J. Rogers, P. Roth, K. Spafford, and S. Yalamanchili, “Keeneland: Bringing heterogeneous GPU computing to the computational science community,” IEEE Computing in Science and Engineering, 13(5):90-5, 2011.

2010 - McNally, S., Jones, N. (2010). Scalable Systems Management with Puppet. Half-day tutorial at TeraGrid 2010, August 2 - 5, Pittsburgh, PA