RESEARCHED WITH AUTUMN
KC
Kam Chuen Tung
Quantitative Systematic Trader at Susquehanna International Group (SIG); PhD in Computer Science, University of Waterloo
Susquehanna International Group · 
Sydney, New South Wales, Australia · engineer
Sydney, New South Wales, Australia · engineerDetails
AlgorithmsSpectral graph theoryTheoretical computer scienceCompetitive programmingQuantitative tradingC++WritingSolving puzzlesChoir singing
Notes
- Quant employment verification: CONFIRMED. Kam Chuen Tung (Alex Tung) states on his own personal website (last updated 2025-02-08) that after obtaining his PhD he 'will start working at SIG as a Quantitative Systematic Trader in June 2025', and the LinkedIn/ClickHouse index separately records 'Quantitative Systematic Trader at Susquehanna International Group' as a current role (Sydney, Australia). SIG (Susquehanna International Group, sig.com) is a global proprietary trading firm and market maker, i.e. a genuine quantitative finance employer, not merely a name containing 'quant'. The role is a full-time position, not a student program, competition or camp. Identity is supported: the site self-identifies as Kam Chuen Tung (Alex), from Hong Kong, Codeforces handle alex20030190, matching the IOI statistics page which links the same Codeforces handle.Feb 8, 2025
- IOI record confirms Kam Chuen Tung represented Hong Kong, China at IOI 2013, 2014 and 2015, winning Silver in each year (2015 score 389.42, rank 47/322).Aug 2015
- IMO 2015: represented Hong Kong and received an Honourable Mention (283 pts, 51.1%); described in official HK government press release as a Secondary Six student at La Salle College.Jul 2015
- PhD in Computer Science, University of Waterloo (2019-2025), advisor Prof. Lap Chi Lau; thesis 'Reweighted Eigenvalues: A New Approach to Spectral Theory beyond Undirected Graphs' (2025).
- BSc in Mathematics with First Class Honours and a minor in French from The Chinese University of Hong Kong (2015-2019).2019
- Index-only: the LinkedIn/ClickHouse enrichment record lists current employers as 'Quantitative Systematic Trader at Susquehanna International Group' and 'Scientific Committee Head at Hong Kong Olympiad in Informatics (HKOI)', and past employers at NII Japan, CUHK and Berkeley Lab; these are index claims, not independent primary-source confirmation.
- Research publications in top theory venues: FOCS 2022 (Cheeger inequalities for vertex expansion and reweighted eigenvalues), STOC 2023, SODA 2024, IPCO 2024 - a sustained spectral-graph-theory research line during the PhD.
- Codeforces handle alex20030190 is Alex Tung, Hong Kong, University of Waterloo, International Grandmaster (max rating 2718); the Codeforces profile is the handle the IOI statistics page links.
- Research internships/visits before and during the PhD: Lawrence Berkeley National Laboratory (2018, with Prof. Esmond Ng) and National Institute of Informatics, Tokyo (2023, with Prof. Yuichi Yoshida) - these are research roles, not quantitative-finance roles.
- Serves on the Hong Kong Olympiad in Informatics Organizing Committee since 2015; Head of Competition Committee 2016, Head of Scientific Committee since 2019, authoring 80+ contest problems - a decade-long volunteer commitment to the HK competitive-programming community.
- Awards include the Chariton Type I Scholarship (Waterloo, 2023-2025), Go-Bell Scholarship (Waterloo, 2019-2021), Professor Charles K. Kao Research Exchange Scholarship (CUHK, 2018), and Hang Lung Mathematics Awards Honourable Mention (2015) for research on a generalized tic-tac-toe problem.
Experience
Quantitative Systematic Trader at Susquehanna International Group (SIG)
Jun 2025 - Present
Sydney, New South Wales, Australia
Stated on his own site: 'I will start working at SIG as a Quantitative Systematic Trader in June 2025.'
Head of Scientific Committee at Hong Kong Olympiad in Informatics (HKOI)
Jan 2019 - Present
Authors programming problems for HKOI, the TFT and training contests; 80+ problems authored since 2015; Head of Competition Committee 2016, Head of Scientific Committee 2019.
PhD in Computer Science at University of Waterloo
Jan 2019 - Jan 2025
Waterloo, Canada
Advisor Prof. Lap Chi Lau; thesis 'Reweighted Eigenvalues: A New Approach to Spectral Theory beyond Undirected Graphs'.
Research Intern at National Institute of Informatics
Jan 2023 - Jan 2023
Tokyo, Japan
Visited Prof. Yuichi Yoshida; spectral graph theory; one project published at IPCO.
Research Assistant at The Chinese University of Hong Kong
Jan 2018 - Jan 2018
Department of Mathematics; conjectures on Brascamp-Lieb inequalities.
Research Visitor at Lawrence Berkeley National Laboratory
Jan 2018 - Jan 2018
Berkeley, CA, United States
Visited Prof. Esmond Ng; implemented and tested numerical algorithms for sparse symmetric indefinite linear systems.
Teaching Assistant / Instructional Apprentice at University of Waterloo
Jan 2019 - Jan 2024
Grading, tutorials, office hours, automated grading systems.
Quantitative Systematic Trader at Susquehanna International Group
Jun 2025 - Present
Sydney, Australia
Education
University of Waterloo
Jan 2019 - Jan 2025
PhD in Computer Science, Computer Science
Advisor Prof. Lap Chi Lau; thesis on reweighted eigenvalues and spectral theory.
The Chinese University of Hong Kong
Jan 2015 - Jan 2019
BSc in Mathematics, Mathematics (minor in French)
First Class Honours; minor in French.
Projects
Reweighted Eigenvalues theory
AchievementsSilver medals at IOI 2013, 2014 and 2015 representing Hong Kong, China · Honourable Mention at IMO 2015 representing Hong Kong · ICPC World Finals 2016 (28th) and 2017 (34th) · Codeforces International Grandmaster (max rating 2718)
AwardsIOI Silver Medal 2013, 2014, 2015 (Hong Kong, China) · IMO 2015 Honourable Mention (Hong Kong) · Chariton Type I Scholarship, University of Waterloo (2023-2025) · Go-Bell Scholarship, University of Waterloo (2019-2021) · Professor Charles K. Kao Research Exchange Scholarship, CUHK (2018) · Dean's Honours List, CUHK (2015-2018) · Hang Lung Mathematics Awards Honourable Mention (2015)
Profiles
Competition record
Hong Kong, China · IOI