Po-Shen Loh is a social entrepreneur, working across the full spectrum of mathematics and education, all around the world. He is the founder of NOVID, the world's first contact tracing app demonstrably able to sense proximity with the necessary sub-meter accuracy for contact tracing. He is also the founder of the free personalized learning platform expii.com, an education technology social enterprise which algorithmically curates openly licensed math/science lessons and problems contributed by the world. He is a mathematics professor at Carnegie Mellon University, and also the national coach of the USA International Mathematical Olympiad team, which took first place in the world in 2015, 2016, 2018, and 2019. His research and educational outreach takes him to cities across the world, reaching an annual in-person audience of nearly 15,000 people through public lectures and events. Online, he has featured in or co-created videos totaling over 9 million YouTube views. Bilingual in English and Chinese, he established a focus area on math education in China, founding 罗博深数学 (Luoboshen Math), a new brand of mathematics education which synthesizes approaches to education learned from his travels to many countries, together with his core mathematical background as a professional researcher working at the frontier of mathematical discovery, and his understanding of extreme human potential as a national math coach. In the USA, this was released as the Daily Challenge with Po-Shen Loh (https://daily.poshenloh.com), and has been reviewed as the best online math course for students in the top-10% of their middle school math class.

This synthesis of fundamental mathematical expertise, combined with activity that interfaces with the global public, is Prof. Loh's signature approach in his mission to raise the world's interest and ability in mathematics. On the mathematical side, he co-authored over 30 original research papers exploring questions at the intersection of network analysis, combinatorics, probability, and algorithms, and was recognized by the USA Presidential Early Career Award for Scientists and Engineers. On the education side, he founded programs and created infrastructure to systematically enact impact. His free online platform (Expii) hosts over 25,000 problems and lessons on secondary school math and science topics, supported in part by the Overdeck Family Foundation and Templeton World Charity Foundation. In offline work, in addition to leading the organization of the USA national math Olympiad training program, he also created an annual summer math enrichment program hosted at Tsinghua University, to introduce 60 nationally-selected high school students (from the entirety of China) to the pathway beyond math competitions.

Prof. Loh has a Ph.D. in mathematics from Princeton University, a master's degree in mathematics from the University of Cambridge, and an undergraduate degree in mathematics from the California Institute of Technology. He himself is a former Olympiad medalist, winning silver in the 1999 International Math Olympiad, where he represented the United States of America on its national team.