# Machine Learning Researcher – PhD Intern (US) [Citadel](https://www.jorb.ai/firms/citadel.md) · New York · United States · [Hedge Fund & Quant](https://www.jorb.ai/jobs/hedge-fund-quant.md) Citadel is hiring a Machine Learning Researcher – PhD Intern (US) in New York. Posted 2026-05-29; applications close 2026-07-28. **Apply**: https://www.citadel.com/careers/details/machine-learning-researcher-phd-intern-us/ Posted 1d ago. ## Role details ## Overview At Citadel, our mission is to be the most successful investment team in the world. Quantitative Researchers play a key role in this mission by developing next-generation models and trading approaches for a range of investment strategies. You’ll apply sophisticated and complex statistical techniques to financial markets and work with some of the most complex datasets in the world. ## Internship Program As an intern, you’ll challenge the impossible in research through an 11-week program that enables collaboration and connection with senior team members. You’ll have opportunities to network and socialize with peers throughout the internship. Our signature internship program takes place June through August, with occasional flexibility to other times of the year. You will be able to indicate your timing preference in the application. ## 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 datasets, 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 - Hands-on programming experience in Python or C++ - A background demonstrating strong problem-solving skills - 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 - Opportunity located in New York ## Compensation In accordance with applicable law, the base salary range for this role is $4,300 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 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 growth and drive real impact. ## Application Start Application ## Applying to this role This Machine Learning Researcher – PhD Intern (US) role at Citadel runs through the firm's own careers portal and expects a CV and cover letter written specifically for the posting, not a portable submission carried across firms. Jorb AI's application agent tailors a CV and cover letter from your background to this posting and tracks the role alongside the rest of your applications. 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