Sotiris Xantheas

Sotiris S. Xantheas (Σωτηρης Ξανθεας) is a Laboratory Fellow in the Advanced Computing, Mathematics and Data Division at Pacific Northwest National Laboratory (PNNL) in Richland, WA{{Cite web|url=https://www.pnnl.gov/people/sotiris-xantheas|title=Sotiris Xantheas|website=www.pnnl.gov|access-date=2024-05-10|archive-date=2024-05-08|archive-url=https://web.archive.org/web/20240508205330/https://www.pnnl.gov/people/sotiris-xantheas|url-status=live}} and an Affiliate Professor, UW - PNNL Distinguished Faculty Fellow in the Department of Chemistry at the University of Washington in Seattle, WA, USA.{{Cite web |url=http://depts.washington.edu/chem/people/faculty/xantheas.html |title=Archived copy |access-date=2019-01-19 |archive-date=2018-09-17 |archive-url=https://web.archive.org/web/20180917181924/http://depts.washington.edu/chem/people/faculty/xantheas.html |url-status=live }} He is an adjunct professor in the Department of Mathematics and Statistics at Washington State University in Pullman, WA, USA,{{Cite web |url=http://www.math.wsu.edu/faculty/sxantheas/ |title=Archived copy |access-date=2019-01-19 |archive-date=2018-09-17 |archive-url=https://web.archive.org/web/20180917181901/http://www.math.wsu.edu/faculty/sxantheas/ |url-status=live }} and a specially appointed professor in the World Research Hub Initiative (WRHI) at the Institute of Science Tokyo (former Tokyo Technological Institute) in Tokyo, Japan.{{Cite web|url=https://www.irfi.titech.ac.jp/en/people/xantheas-sotiris/|title=Sotiris Xantheas | WRHI – Tokyo Tech World Research Hub Initiative|website=www.irfi.titech.ac.jp}} {{dead link |date=May 2024 |fix-attempted=yes}} In 2022 he was awarded a Gauss Professorship from the Göttingen Academy of Sciences and Humanities.{{Cite web|url=https://www.pnnl.gov/news-media/xantheas-honored-gauss-professorship|title=Xantheas Honored with Gauss Professorship|date=March 28, 2023|website=www.pnnl.gov|access-date=May 19, 2023|archive-date=May 10, 2024|archive-url=https://web.archive.org/web/20240510182206/https://www.pnnl.gov/news-media/xantheas-honored-gauss-professorship|url-status=live}}

At PNNL he is the Director of the Computational and Theoretical Chemistry Institute (CTCI).{{Cite web|url=https://www.pnnl.gov/projects/computational-and-theoretical-chemistry-institute|title=Computational and Theoretical Chemistry Institute|website=www.pnnl.gov|access-date=2023-09-10|archive-date=2023-10-30|archive-url=https://web.archive.org/web/20231030235718/https://www.pnnl.gov/projects/computational-and-theoretical-chemistry-institute|url-status=live}} He also directs the Center for Scalable Predictive Methods for Excitations and Correlated Phenomena (SPEC),{{Cite web|url=https://spec.labworks.org/|title=Log in | SPEC|website=spec.labworks.org|url-access=registration|access-date=2023-10-12|archive-date=2023-09-27|archive-url=https://web.archive.org/web/20230927083637/https://spec.labworks.org/|url-status=live}} a project that is funded by the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences, Chemical Sciences, Geosciences and Biosciences Division as part of the Computational Chemical Sciences (CCS) program. He is a co-Principal Investigation in the Molecular Theory project, which is funded from the Condensed Phase and Interfacial Molecular Science program from the same DOE Division. In addition, he runs PNNL's Open Call Laboratory Directed Research and Development program, an effort that is intended to enable Early Career Science & Engineering staff to pursue innovative ideas that lie outside major Laboratory investments.

Xantheas is an Elected Fellow of the American Association for the Advancement of Science, the American Physical Society,{{Cite web |url=https://www.aaas.org/fellow/xantheas-sotiris |title=Xantheas, Sotiris |publisher=aaas.org |accessdate=April 23, 2017 |archive-date=June 23, 2018 |archive-url=https://web.archive.org/web/20180623085241/https://www.aaas.org/fellow/xantheas-sotiris |url-status=dead }}{{Cite web |url=http://www.pnnl.gov/science/staff/staff_info.asp?staff_num=5610 |title=Sotiris Xantheas |publisher=pnnl.gov |accessdate=April 23, 2017 |archive-date=April 24, 2017 |archive-url=https://web.archive.org/web/20170424175531/http://www.pnnl.gov/science/staff/staff_info.asp?staff_num=5610 |url-status=live }} and the Washington State Academy of Sciences (WSAS), a Marie Curie Fellow, a Fellow of the Japan Society for the Promotion of Science (JSPS) and a visiting Fellow at the Institute for Advanced Study at the Technical University of Munich at Garching, Germany. He is the recipient of the "Friedrich Wilhelm Bessel" Award from the Alexander von Humboldt Foundation in Bonn, Germany, and the Director’s Award for Exceptional Scientific Achievement at PNNL (twice). Since 2023 he serves as an elected member on the Board of Regents of the University of Peloponnese, Tripolis, Greece.