Citadel Hired Alexey Poyarkov as GQS SCI Head
The veteran quantitative expert joins Citadel following a decade-long career at TGS Management LLC.
Updated on Sept. 22, 2026 in People
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Citadel has appointed Alexey Poyarkov to lead its GQS SCI group. The hiring follows a period of transition within the firm as Brian Murphy stepped down from his role overseeing the GQS group.
Why it matters
The recruitment signals a strategic shift in Citadel's leadership ranks as the firm secures industry talent from prominent quantitative competitors. This transition follows internal restructuring that saw the departure of the previous group head.
Poyarkov brings over 10 years of experience from TGS Management LLC, where his initial compensation package reached $700,000. He joins Citadel after having held previous positions at major technology firms including Microsoft, Google, and Yandex.
The players
Alexey Poyarkov
He is the newly appointed head of GQS SCI at Citadel who previously spent over a decade as an algorithm designer at TGS Management LLC.
Citadel
This is a Chicago-based global investment firm that manages significant assets and employs specialized quantitative teams.
Brian Murphy
He is the former head of the GQS group at Citadel who recently stepped down from his leadership position.
TGS Management LLC
This is a quantitative investment firm where Alexey Poyarkov worked for more than a decade.
The details
Alexey Poyarkov announced his new position at the Chicago-based firm via a LinkedIn update. He brings a deep background in algorithm design and quantitative research, having graduated from Lomonosov Moscow State University before spending a decade at TGS.
Timeline
Poyarkov was hired by TGS as an algorithm designer in 2017.
Bo Liu departed TGS for Millennium in 2021.
Joseph Choi reportedly left TGS in 2023.
JCAP hedge fund closed in 2024.
Poyarkov's LinkedIn profile did not list an employer in May 2026.
Market Landscape
This move highlights the ongoing competition for top-tier quantitative talent among major hedge funds. It follows a series of high-profile staff shifts at TGS Management, reflecting broader consolidation and personnel flux within the quantitative finance sector.
For clients and stakeholders, this leadership change indicates a continuity in Citadel's focus on quantitative strategy. The firm's ability to attract long-term talent suggests a stable outlook for its GQS group operations.
The takeaway
The addition of a decade-long veteran to the GQS team highlights the premium placed on deep algorithmic expertise in current financial markets. Investors should monitor how this new leadership shapes the fund's quantitative performance going forward.
Further reading
For more on industry leadership changes, visit the People section.
Source note: This article includes information reported by EFinancialCareers.
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