Citadel & Citadel Securities Internship Program

Citadel and Citadel Securities run some of the most competitive and best-paid internships in finance, placing students on quantitative research, trading and engineering teams in New York, Chicago, Miami, London and Hong Kong for ten to eleven weeks. Interns own projects with real production stakes, guided by senior researchers and engineers, with housing support and compensation consistently reported at the top of the industry.

Applications open extraordinarily early, often more than a year before each summer, and run rolling until filled. Preparation is everything: coding assessments arrive fast, and interview rounds probe algorithms, probability and market reasoning in depth.

• Undergraduate, master's and PhD students with outstanding records in computer science, mathematics, statistics, physics, engineering or economics.
• Roles across quantitative research, trading, software engineering, and investment analyst tracks at both Citadel (the hedge fund) and Citadel Securities (the market maker).
• Elite problem-solving evidence stands out: olympiads, ICPC, research publications, or serious systems projects.
• Strong programming for engineering and quant roles, typically Python and C++.
• Offices span the US, Europe and Asia-Pacific, with visa support for many roles.
• First and second-year students can target the early-identification events and programs the firm runs each year.
• Intellectual intensity and ownership are explicit selection criteria.

• Own a project with real production stakes on a trading, research or engineering team for ten to eleven weeks.
• Quant interns research signals, build models and backtest strategies with mentor review.
• Engineering interns design and ship low-latency systems, data platforms or tooling used by the business.
• Attend the internship's education series and social programming, including offsite events.
• Work directly with senior researchers, traders and engineers in small teams.
• Finish with a formal evaluation that drives return offers at industry-leading full-time compensation.

• Compensation consistently reported among the very highest of any internship, with housing support commonly provided.
• Mentorship inside one of the world's most successful hedge funds and market makers.
• High-caliber peer cohort and a heavily structured learning program.
• Multiple office locations across the Americas, Europe and Asia-Pacific.
• Early-talent programs and competitions (like Terminal by Citadel) create on-ramps before penultimate year.
• Strong conversion into full-time offers for top performers.

• Apply on the Citadel careers site to the specific intern role and office; postings for each summer open very early (often 12 or more months ahead) and close as seats fill.
• Choose between Citadel and Citadel Securities role families based on your interest in investing versus market-making and systems.
• Expect online assessments (coding or math) soon after applying, followed by multiple technical interview rounds.
• Prepare deeply: data structures and algorithms for engineering, probability and statistics for quant roles, and market reasoning for trading.
• Superday-style final rounds decide offers, sometimes with take-home projects.
• Reapplication next cycle is normal if you fall short; many successful interns applied more than once.