Citadel Securities

Citadel Securities runs a single 11-week summer internship across three core role families — Markets & Trading, Quantitative Research and Engineering — with Business Operations and Fundamental Analyst tracks listed alongside on the firm's open-roles board. In front of that internship sits a layered set of earlier-touchpoint events aimed at first- and second-year undergraduates:

• Discover Citadel Securities: invitation-only two-day event held in New York, London, Hong Kong or Singapore, for first- and second-year undergraduates
• Citadel Securities Quant Invitational: invite-only five-day research challenge in Miami for sophomore STEM students
• Ignite Women's Trading Program: invite-only weeklong program for sophomore women interested in trading
• Datathon and >_Terminal: open undergraduate competitions whose top performers earn an interview opportunity at the firm
• PhD Summit: invite-only two-day event for PhD students and postdocs

Several of these named cohorts are invitation-only, meaning Citadel Securities pre-identifies first- and second-year candidates rather than running an open spring-week. For a student targeting the firm, the practical entry point therefore opens roughly a year before the summer-internship application itself; missing that earlier loop leaves only the direct application route, against a much wider candidate pool.

On its own "What We Do" page, Citadel Securities describes itself as the largest provider of equities liquidity across global capital markets and the largest U.S. options market maker for all major options classes, with fixed income and FX activity across more than 50 markets. The firm has been named Risk Awards Flow Market Maker of the Year in 2021, 2022, 2024 and 2026, and IFR's Flow Marketmaker of the Year for 2025 — recurring recognition that independent trade press has corroborated across the same period. It led the creation of MEMX, an industry-built U.S. equities exchange, and in 2025 acquired Morgan Stanley's electronic options market-making unit. For early-career applicants this concentrates the career around principal trading: the firm's three role families — Markets & Trading, Quantitative Research and Engineering — all sit on the P&L of a single liquidity franchise, with no advisory, asset management or corporate-banking adjacencies to rotate into.

Yes. Citadel Securities currently has 21 open internship and graduate roles on Jorb AI: summer internships, insight programs, graduate schemes, and early-career positions across the United Kingdom, Hong Kong, Singapore, and the United States. Postings update continuously as new roles are added and filled.

Citadel Securities has open internship and graduate roles in the United Kingdom, Hong Kong, Singapore, and the United States. Specific offices and program structure (summer vs year-round, internship vs graduate scheme) vary by region; check individual postings for details.

Applications to Citadel Securities go through the official careers site. Each role on this page links directly to the specific application. Citadel Securities does not use third-party submission services.