Po-Shen Loh

Po-Shen Loh is a mathematician (combinatorics) and educator at Carnegie Mellon University and coach of the USA IMO team from 2014 to 2023. He founded the education nonprofit Expii (2014, with NOVID/LIVE products) and the LIVE by Po-Shen Loh math-class platform. He competed at IMO 1999 (silver, USA) and holds a PhD from Princeton (2010).

Notes5

• Quant employment verification: CONFIRMED. Po-Shen Loh's own CV (math.cmu.edu/~lohp/cv) lists 'The D.E. Shaw Group, New York, New York — Quantitative Analyst Intern, Summers 2005 and 2007' under Previous positions, and 'Microsoft Research, Seattle, Washington — Research Intern, Summer 2009'. The D.E. Shaw Group is a quantitative hedge fund / market-making firm, so this is an actual past internship in quantitative finance. Identity is supported: the CV is the CMU faculty CV of the same Po-Shen Loh (CMU Professor of Mathematics) whose olympiad and career identity is independently corroborated. The LinkedIn lead title 'Quantitative Analyst intern, 2007' understates the record: the CV shows two summers (2005 and 2007). Student programs, competitions, camps, and scholarships are explicitly excluded from this conclusion.2026
• No quantitative-finance employer appears in his current or post-PhD positions; the only quant-finance role is the two-summer D.E. Shaw analyst internship (2005, 2007) before his Princeton PhD, and his career since is academic (CMU Mathematics) plus education entrepreneurship.
• Competed at IMO 1999 for the United States; official IMO participant record id 5589. Coached the USA IMO team as Assistant (2002, 2003), Instructor (2008, 2009), Deputy Leader (2004, 2010-2013), National Coach (2013-2023).
• Founder and CEO of Expii, Inc. (2014-present), producer of NOVID.org and live.poshenloh.com, per his CV.
• Held a Research Intern role at Microsoft Research, Seattle in Summer 2009 (during his Princeton PhD), per his own CV.
• Vice President for Advancement of the International Math Olympiad Foundation (2023-present), per his CV.
• CMU faculty listing gives work contacts: [contact omitted] and [contact omitted], work phone 412-268-2548, ORCID 0000-0002-0777-0644.
• Tenth anniversary profile: CMU's 50th-anniversary founder series documents him as CMU Professor of Mathematics.
• Featured in Quanta Magazine (2021) on leading the USA math team back to first place.