Citadel Securities’ youthful Zurich office grew, courtesy of Google
In a time when tech firms are cutting back like they haven’t in years, their very best people can still find their places in the world – such as at the world’s largest electronic market making firms.
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Ferenc Tóth joined Citadel Securities in Zurich this week as a software engineer in its platform research team. He arrived from Google, where he spent seven years, also in Zurich, and was most recently a staff engineer.
Tóth might find himself around a few familiar faces – CitSec’s Zurich office is flush with ex-Googlers. His immediate boss, platform research head Costas Bekas, is a former IBM distinguished researcher, though. Hedge funds are fond of IBM’s machine learning team; veteran Vaibhava Goel joined Millennium in New York last year.
Citadel Secruties’ Zurich office is as good as they come. Founded in 2019, it was initially led by award winning statistician Nicolai Meinshausen, who took a brief break from the firm in 2021 before returning in August 2025 as head of principal research.
Despite the Zurich office’s small footprint, it’s an outsized employee of local quant talent. Of the 15 open internships on Citadel Securities’ website, three are in Zurich – including for quantitative research, as either an analyst, PhD, or engineer.
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