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Citadel Securities

32 student programmes across United States, United Kingdom, Europe, Hong Kong, Singapore and Australia. Last checked 10 Oct 2026.

Prepare for Citadel SecuritiesOfficial careers site

Programmes and deadlines

Region
Level

The interview process

  1. 1

    Application

    Official

    Apply through the role page on citadelsecurities.com. Internships are 11-week paid programmes, normally June to August; BS/MS roles ask for a bachelor's or master's in a quantitative field, PhD roles a PhD. Citadel Securities' own guidance (a 2022 PDF, so possibly dated) says the internship application process starts in July and most of the class is admitted by January. Early-years events (Discover, Quant Invitational, PhD Summit, Ignite) have their own application pages with fixed deadlines, notification dates, and paid travel and hotel.

  2. 2

    Application timing

    Reported

    No official opening date or deadline is published on the role pages that were visible. A prep site reports rolling review, so apply early (the most competitive offices fill first), with online assessments in roughly September-October, first-round interviews October-December, Superdays November-January and offers January-February.

  3. 3

    Online assessment

    Reported

    Citadel Securities does not publish the format. Candidates report a probability-heavy test for quantitative trading (from about 15 short probability questions in 30 minutes to mixed coding-and-probability formats) and a HackerRank-style coding test (2-3 medium problems) for engineering roles.

  4. 4

    First-round interview (quantitative research)

    Official

    A 45- to 60-minute remote interview covering technical and behavioural skills, with focus on programming, data structures and algorithms, and problem-solving (core languages Python and C++, any language welcome). You are also asked about your technical interests, past internships, projects and why Citadel Securities.

  5. 5

    Second round (quantitative research)

    Official

    An onsite round of usually three to five 60-minute interviews that assess a mix of technical and behavioural skills.

  6. 6

    Final review and decision

    Official

    After the second round, hiring managers across teams decide your fit with their team; if several teams are interested you work with your recruiting contact to choose the best fit. The campus quantitative research process typically takes about four to five weeks from start to finish.

  7. 7

    Interviews (quantitative trading)

    Reported

    Reported by candidates: a roughly 45-minute first interview after the online assessment (Fermi estimates, market-making and dice problems), two 45-minute technical rounds, then an in-person Superday focused on market making. Citadel Securities does not publish the trading interview format.

Official means the information comes from Citadel Securities's own website or job board. Reported means a reputable third party published it. Whitmore is independent and not affiliated with Citadel Securities. Always confirm details on the firm's own site before applying.