Service
Across more than two decades, my service to the computing community has spanned the leadership of flagship conferences and journals, hundreds of peer-review and program-committee appointments, and research-funding evaluation for national agencies on four continents — alongside sustained academic leadership at Virginia Tech and Queen’s University Belfast. The record below captures both the breadth and the depth of that engagement, nationally and internationally.
Conference & Community Leadership
Steering, chairing, and shaping the direction of the field’s leading systems and high-performance computing venues.
- ACM International Conference on Supercomputing (ICS) — 2024–present (Associate Chair, 2023–2024)
- IEEE International Symposium on Performance Analysis of Systems and Software (ISPASS) — 2022–2023
- ACM International Conference on Supercomputing (ICS) — 2022–present
- IEEE International Symposium on Performance Analysis of Systems and Software (ISPASS) — 2018–present
- IEEE International Conference on Cluster Computing (CLUSTER) — 2009–2011, 2017–2019
- ACM/IEEE Int’l Symposium on High-Performance Parallel and Distributed Computing (HPDC) — 2026
- ACM International Conference on Supercomputing (ICS) — 2022, 2023
- IEEE/ACM International Symposium on Cluster, Cloud and Grid Computing (CCGRID) — 2014
- EuroMPI Conference — 2011; IEEE ScalCom — 2011; and multiple international workshops (DUAC, PASA, PPAC)
- IEEE International Parallel and Distributed Processing Symposium (IPDPS) — Area Chair, Programming Models & Runtime Systems — 2026
- EuroPar — Global Area Chair, Scheduling and Load Management — 2022
- IEEE/ACM Supercomputing (SC) — Area Chair — 2014; IPDPS — 2011; ICPP — 2007; SAMOS — 2016; EuroPar — 2012
- IEEE International Conference on Cluster Computing (CLUSTER) — 2010, 2018
- IEEE International Symposium on Performance Analysis of Systems and Software (ISPASS) — 2018
- Plus seven international workshops at SC, ISC, HiPEAC, ParCo, and ICPP on energy-efficient, approximate, and edge computing — 2013–2018
Program Committees
More than 215 program-committee appointments since 2001 — counting each conference-year separately — across 50+ distinct venues spanning architecture, systems, HPC, and AI, including senior- and area-committee roles.
Additional committee service includes External Review Committees (MICRO, PPoPP), Reproducibility & Artifact Evaluation (SC, IEEE TPDS), the SC HPC Impact Showcase (Chair, 2017), and Tutorials/Workshops chairing at ICS, ISC, HiPEAC, and EuroMPI. Session Chair on 23 occasions, including the ICS keynote sessions (2022, 2023).
Editorial Boards & Journals
Seventeen editorial appointments across the leading journals in high-performance and sustainable computing.
- Computer Physics Communications — HPC Specialist Editor — 2017–present
- Int’l Journal of High Performance Computing Applications (IJHPCA) — Associate Editor — 2012–present
- Journal of Computational Science — Editorial Board — 2014–present
- Sustainable Computing: Informatics and Systems (SUSCOM) — Editorial Board — 2010–present (Guest Editor, 2014)
- IEEE Transactions on Parallel and Distributed Systems (TPDS) — Associate Editor — 2018–2021; Best Paper & Artifact Evaluation Committees, 2020–2021
- Int’l Journal of Parallel, Emergent and Distributed Systems (IJPEDS) — Associate Editor — 2010–2019
- Future Internet — Editorial Board — 2020–2026; Frontiers in High-Performance Computing — Editor — 2023–2024
- Guest Editor: Parallel Computing (PARCO, 2015), IET Computers & Digital Techniques (2014); Editorial Boards: Scientific Programming, CCPE, and earlier venues
Sustained reviewing for the field’s top journals and publishers — including ACM TOCS, ACM TOPLAS, ACM TACO, IEEE Transactions on Computers, Proceedings of the VLDB Endowment, and IEEE Micro — across more than 40 distinct outlets.
Research Funding Panels — National & International
More than 45 panel and proposal-evaluation appointments — counting each year separately — for government and national funding agencies worldwide.
- National Science Foundation (NSF) — Panelist — 2002, 2003, 2004, 2008, 2021, 2023, 2024, 2025
- U.S. Department of Energy (DOE) — Reviewer — 2020
- Coastal Virginia Center for Cyber Innovation (COVA CCI) — 2021; Maryland Industrial Partnerships — 2007; U.S.–Israel Binational Science Foundation — 2009
- UK EPSRC — Reviewer & Platform Grant Panelist — 2012–2021
- Royal Academy of Engineering (UK) — 2015, 2017
- European Research Council (ERC) — 2020; European Commission FP7 — 2012–2016
- French National Research Agency (ANR) — Panelist — 2025
- Swiss National Science Foundation — 2016, 2020, 2025
- Hellenic Foundation for Research & Innovation (Greece) — 2024, 2025
- Austrian Academy of Sciences — 2017; Italy (CINECA) — 2021; Sweden (KK-Stiftelsen) — 2021; Netherlands (STW) — 2016; Poland (NSC) — 2016; Cyprus — 2016
- NSERC — Discovery Grants Panelist — 2014, 2015, 2016 (Reviewer, 2007)
External Leadership, Advisory & Evaluation
- Computing Research Association (CRA) — Leadership Academy Committee — 2024–present
- American Association for the Advancement of Science (AAAS) — Session Reviewer — 2024
- Scientific Advisory Board, Kelvin Tier-2 HPC Centre, Queen’s University Belfast — 2021–present
- Faculty Appointment Committees: NTNU, Norway — 2022; Heidelberg University, Germany — 2021; University of Ioannina, Greece — 2022
- External Accreditation & Evaluation Panels: Hellenic Open University — 2023; University of Ioannina — 2022; NCSR Demokritos, Greece — 2022; FORTH-ICS Seed Grants — 2021–present
- Scientific Advisory Board, Marie Curie Individual Fellowship — 2022
University & Departmental Leadership
- College of Engineering Promotion & Tenure Committee — 2025–present
- Computer Science Personnel Committee — Chair — 2025–present (member since 2022)
- Associate Director, Stacks@CS Center for Computer Systems Research — 2022–present
- Department Head Search Committee — 2023–2024; University Proposal Development Institute Mentor — 2024–present
- Head of School, Electronics, Electrical Engineering & Computer Science — 2016–2018
- Director, ECIT Global Innovation Institute — 2018–2019; Director, Centre for Data Science & Scalable Computing
- REF Champion (Computer Science & Engineering); Faculty Executive Board; Academic Council — 2016–2019
- Chair, University HPC Advisory Group — 2012–2019; Vice-Chancellor Selection Panel — 2017
As Head of School at Queen’s, the School of EEECS earned the Athena SWAN Silver and Investors in People Silver awards for diversity and inclusion, and reached record research expenditure and enrollment.
Professional Societies & Fellowships
- IEEE — Fellow (2024), Distinguished Visitor (2024–present), Distinguished Contributor (2022–present)
- ACM — Distinguished Member (2018–present); member of SIGARCH, SIGOPS, and SIGHPC
- Fellow — Asia-Pacific AI Association (AAIA), International AI Industry Alliance (AIIA), British Computer Society (BCS), and the Institution of Engineering & Technology (IET)
- Full Member, Sigma Xi; Chartered Engineer (CEng); Member, Technical Chamber of Greece; former member, UK Council of Professors & Heads of Computing (CPHC)
Recognition for Service
- IEEE Award for Editorial Excellence, IEEE Transactions on Parallel and Distributed Systems (2020)
- Elsevier Distinguished Editorial Service Award (2019)
- IEEE Outstanding Service Awards (2010, 2014, 2018)
- Editorial Excellence recognition from Sustainable Computing: Informatics and Systems
Public Engagement & Outreach
Translating computing research for broad audiences — on AI, supercomputing, and the societal and economic impact of data centers.
- TEDxMidAtlantic — “Myths and Ways Forward for AI” — Nov 2025
- More to Know Podcast — “The Future of Data Centers: AI, Energy Demand, and the Next Infrastructure Boom” — Feb 2026
- Press & media on the societal and economic implications of data centers — Cardinal News, Roanoke Times, MSN/WFXR, Northwest Indiana Times, and others — 2024–2025
- Invited conference panelist — SC (2020), EPSRC Manycore Computing (2018), ICPP (2010), IBM ExaChallenge (2012), and Microsoft Faculty Research Summit