Job Description

At Citadel, our mission is to be the most successful investment team in the world. Machine Learning Researchers play a key role in this mission by developing next-generation models and trading approaches for a range of investment strategies. You’ll get to challenge the impossible in quantitative research by applying sophisticated and complex statistical techniques to financial markets, some of the most complex data sets in the world.

Your Objectives

Use statistics, machine learning (e.g. deep learning, NLP) to extract patterns from various kinds of datasets through innovative and rigorous research
Implement algorithms in high-quality code
Work with large data sets, including unconventional and unstructured data sources
Back-test models and document research findings

Your Skills & Talents

PhD degree in mathematics, statistics, physics, computer science, or another highly quantitative field
Advanced training and a strong research track record in machine learning, statistics, deep learning, natural language processing, artificial intelligence, or a closely related quantitative field
Prior experience working in a data driven detailed research environment
Hands on programming experience in Python or C++
A background demonstrating strong problem-solving skills
An ability to communicate advanced concepts in a concise and logical way
Proficiency in creating and using algorithms to meticulously investigate and work through large data or error-checking problems

Opportunities may be available from time to time in any location in which the business is based for suitable candidates. If you are interested in a career with Citadel, please share your details and we will contact you if there is a vacancy available.

In accordance with applicable law, the base salary range for this role is $4,500 to $5,800 per week.

About Citadel

Citadel is one of the world’s leading alternative investment managers. We manage capital on behalf of many of the world’s preeminent private, public and nonprofit institutions. We seek the highest and best use of investor capital in order to deliver market leading results and contribute to broader economic growth. For over 30 years, Citadel has cultivated a culture of learning and collaboration among some of the most talented and accomplished investment professionals, researchers and engineers in the world. Our colleagues are empowered to test their ideas and develop commercial solutions that accelerate their growth and drive real impact.

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About the company

Citadel is an alternative investment manager and hedge fund that oversees capital for institutional clients like pension funds, endowments, and sovereign wealth funds. It uses a team of traders to invest in global financial markets, aiming to grow client assets through speculative opportunities and risk-taking. The firm earns money mainly through performance fees (a share of profits) and management fees (a share of assets under management). Citadel differentiates itself by its track record of profitability, large assets under management, and its focus on improving transparency and resiliency in markets such as the U.S. Treasury market, along with strong risk management and civic leadership. Its goal is to generate high returns for clients while helping maintain fair, efficient markets and expanding its client base and assets under management under leadership from Ken Griffin.

Company Size

5,001-10,000

Company Stage

Private

Total Funding

$15B

Headquarters

Miami, FL

Founded

1990

Get referred to Citadel

See people who can refer or advise you

Simplify's Take

What believers are saying

Reuters on September 4, 2026 reported Citadel seeking U.S. shale oil assets.
Alexey Poyarkov’s Irvine team targets global-equity systematic trading and AI-lab hiring.
Miami’s Brickell tower plans signal long-term commitment and attract recruiting prestige.

What critics are saying

Chris Foster left Citadel in September 2026, exposing dependence on star commodity PMs.
Physical asset acquisitions add drilling, labor, and permitting risk before 2027 integration.
Ken Griffin concentration risk is existential: one wrong succession or legal shock destabilizes Citadel.

What makes Citadel unique

Integrated trading and physical-asset ownership links Citadel’s desks to real production economics.
Ken Griffin authorizes bespoke teams, like Irvine’s GQS SCI, for scarce specialists.
Citadel recruits elite quants from TGS, Goldman, and AI labs, not standard pipelines.

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Benefits

Health Insurance
Life Insurance
401(k) Retirement Plan
401(k) Company Match

Growth & Insights and Company News

6 month growth

1 year growth

12%

2 year growth

12%

eFinancialCareers

Oct 30th, 2026

Some new macro guys left Citadel and ExodusPoint in London.

Some new macro guys left Citadel and ExodusPoint in London. 3 minutes ago In these days of hard times for macro portfolio managers (PMs) and hard talk of 100 people leaving or losing their jobs in London alone, it's unsurprising that PMs are leaving funds. Not all the leavers across the industry have left involuntarily. Some are having a rest. Some have other plans. But many have gone. Recent departures from Citadel's registered London entity include: Avi Tullu, a senior macro volatility portfolio manager who joined from Pimco in September 2025 and left again in September 2026; and Simon Roach, a former head of EMEA rates trading at Merrill Lynch, who left in early October after a long stint that began over a decade ago. Citadel declined to comment. The exits were previously reported by With Intelligence. At ExodusPoint, macro departures from the registered London entity include other recent joiners. Senior macro analyst Soham Sengupta came in December 2025 and left in October 2026 according to the FCA Register. Rupert Guest, an FX trader from Barclays, joined in January 2025 and left again earlier this month. ExodusPoint declined to comment. Amid the departures, new people arrived. As we reported earlier this month, Vineet Mudgil, an FX trader at HSBC in London, just escaped to Citadel after nearly 20 years with the bank. Juniors Emaad Alvi and Max Dykes also joined Citadel's macro team from Tudor and RBC respectively. In New York, Citadel plucked Pedro Goldbaum from Deutsche Bank. One senior macro trader and former hedge fund PM who's been sitting out of the market, watching from the sidelines, observed that these are fine times for someone like him. "Banks have very few macro people left and funds need to hire," he said. Follow me on X. Follow me on LinkedIn. Have a confidential story, tip, or comment you'd like to share? Contact: +44 7537 182250 (SMS, Whatsapp or voicemail). Telegram: @SarahButcher. Signal: sarahbutcher.22 Click here to fill in our anonymous form, or email [email protected]. Bear with us if you leave a comment at the bottom of this article: comments are moderated intermittently by human beings. Sometimes these humans might be asleep, or away from their desks, so it may take a while for your comment to appear. You must take sole responsibility for comments you post on this site. We will take reasonable steps to weed out anything that we consider to be offensive or inappropriate. The essential daily roundup of news and analysis read by everyone from senior bankers and traders to new recruits. Boost your career. Find thousands of job opportunities by signing up to eFinancialCareers today. Top Articles

eFinancialCareers

Oct 30th, 2026

Some new macro guys left Citadel and ExodusPoint in London.

Some new macro guys left Citadel and ExodusPoint in London. 3 hours ago In these days of hard times for macro portfolio managers (PMs) and hard talk of 100 people leaving or losing their jobs in London alone, it's unsurprising that PMs are leaving funds. Not all the leavers across the industry have left involuntarily. Some are having a rest. Some have other plans. But many have gone. Recent departures from Citadel's registered London entity include: Avi Tullu, a senior macro volatility portfolio manager who joined from Pimco in September 2025 and left again in September 2026; and Simon Roach, a former head of EMEA rates trading at Merrill Lynch, who left in early October after a long stint that began over a decade ago. Citadel declined to comment. The exits were previously reported by With Intelligence. At ExodusPoint, macro departures from the registered London entity include other recent joiners. Senior macro analyst Soham Sengupta came in December 2025 and left in October 2026 according to the FCA Register. Rupert Guest, an FX trader from Barclays, joined in January 2025 and left again earlier this month. Jim McKeever, who joined from Caxton in 2024, left too. ExodusPoint declined to comment. Amid the departures, new people arrived. As we reported earlier this month, Vineet Mudgil, an FX trader at HSBC in London, just escaped to Citadel after nearly 20 years with the bank. Juniors Emaad Alvi and Max Dykes also joined Citadel's macro team from Tudor and RBC respectively. In New York, Citadel plucked Pedro Goldbaum from Deutsche Bank. One senior macro trader and former hedge fund PM who's been sitting out of the market, watching from the sidelines, observed that these are fine times for someone like him. "Banks have very few macro people left and funds need to hire," he said. Follow me on X. Follow me on LinkedIn. Have a confidential story, tip, or comment you'd like to share? Contact: +44 7537 182250 (SMS, Whatsapp or voicemail). Telegram: @SarahButcher. Signal: sarahbutcher.22 Click here to fill in our anonymous form, or email [email protected]. Bear with us if you leave a comment at the bottom of this article: comments are moderated intermittently by human beings. Sometimes these humans might be asleep, or away from their desks, so it may take a while for your comment to appear. You must take sole responsibility for comments you post on this site. We will take reasonable steps to weed out anything that we consider to be offensive or inappropriate. The essential daily roundup of news and analysis read by everyone from senior bankers and traders to new recruits. Boost your career. Find thousands of job opportunities by signing up to eFinancialCareers today. Top Articles

Business Insider

Oct 27th, 2026

Citadel, Bridgewater and Man Group use AI to improve processes but worry about malicious bots and "cognitive surrender"

Citadel, Bridgewater and Man Group use AI to improve processes but worry about malicious bots and "cognitive surrender" Oct 28, 2026, 05:57 AM [Original] Investment institutions are introducing AI agents to assist research and processes. However, due to security, regulatory risks and the need to maintain human cognitive judgment, their autonomy is limited. AI is positioned as an auxiliary tool rather than the decision-making subject, because the nature of the market still depends on human behavior. * Leaders from Citadel, Bridgewater Associates and Man Group spoke on Tuesday about how their companies are using AI. * These executives said security concerns and other risks limit the autonomy they give agents. * They agreed that AI itself is not an investment advantage: "At the end of the day, markets are driven by people." Some investment teams at Citadel have built their own replica versions of AI agents that can conduct research independently. Bridgewater's most advanced AIA Labs is "pouring" its refined research and processes into other parts of the organization. Man Group is trying to let employees "do more interesting things" and less burdensome work. Executives from these three investment giants spent a lot of time on Tuesday at a conference hosted by Bloomberg in New York discussing how their companies are developing top-tier AI processes and finding time-saving use cases. But no one is ready to hand the organization entirely over to machines, and even if it becomes possible in the future, they do not expect to do so in the short term. First, letting agents operate uncontrolled outside the company's four walls raises concerns. Aaron Linksy, a partner at the Connecticut hedge fund, said agents cannot be trusted not to "put Bridgewater at risk," which is an "unsolved problem"; he helped found the AIA team. Citadel's Andrew Janian also said the company spends a lot of time ensuring agents' "sandbox" does not allow them to leave; he rejoined the company this year as the organization's acting chief technology officer. In addition to the security and regulatory risks posed by out-of-control agents, panelists also made clear that AI itself is not an investment advantage. Janian said that fundamental investment teams with AI assistants should use the technology to help prepare for meetings or challenge their own ideas, rather than writing investment theses. Man Group chief investment officer Greg Bond lamented that those who hand all their work over to this technology and shift into autopilot have already experienced "cognitive surrender." He said he hopes PowerPoint presentations will gradually be eliminated, and meetings will focus more on "getting everyone in the same room to talk." "Let's get back to human-to-human interaction," said Bond, who once headed a quantitative unit at Man Group. "These systems are designed by humans, and at the end of the day, markets are driven by humans." This article was initially drafted by Business Insider TW with AI-assisted translation and confirmed through manual review.

Business Wire

Oct 13th, 2026

OnKure, Inc. Raises $55 Million Series B Financing

OnKure, Inc., a privately-held biopharmaceutical company developing best-in-class, targeted oncology therapeutics, today announced that it has raised $55 mil...