# Machine Learning Researcher – PhD Intern (US) [Citadel Securities](https://www.jorb.ai/firms/citadel-securities.md) · New York · United States · [Hedge Fund & Quant](https://www.jorb.ai/jobs/hedge-fund-quant.md) Citadel Securities is hiring a Machine Learning Researcher – PhD Intern (US) in New York. Posted 2026-05-29; applications close 2026-07-28. **Apply**: https://www.citadelsecurities.com/careers/details/machine-learning-researcher-phd-intern-us/ Posted 1d ago. ## Role details ## Overview Citadel Securities is a leading global market maker. Our team of quantitative researchers models the markets and brings trading strategies to life. We strive to leverage and tailor state-of-the-art machine learning and AI algorithms to modernize the quantitative trading industry. We are seeking extraordinary and highly motivated researchers who are excited about solving challenging problems in a fast-paced environment. ## Internship Program As an intern, you’ll tackle advanced research through an 11-week program that enables collaboration with senior team members. You will have opportunities to network and socialize with peers throughout the internship. Our signature program runs June through August, with some flexibility to accommodate other times of the year. You will be able to indicate your timing preference in the application. ## Your Objectives - Use statistics, machine learning, or AI (e.g., deep learning, NLP) to extract patterns from diverse datasets through 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 statistics, machine learning, AI, or another highly quantitative field - Hands-on programming experience in scripting (e.g., Python) and/or compiled languages (e.g., 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 ## Opportunities Opportunities available in Miami and 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 Securities Citadel Securities is a technology-driven, next-generation global market maker. We provide institutional and retail investors with world-class liquidity, competitive pricing, and seamless front-to-back execution across a broad array of financial products. Our teams of engineers, traders, and researchers harness leading-edge quantitative research and the accelerating power of compute, machine learning, and AI to power our analytics and tackle the market’s and our clients’ most critical challenges. Together, we are forging the future of capital markets. For more information, visit citadelsecurities.com. ## Application Start Application ## Applying to this role This Machine Learning Researcher – PhD Intern (US) role at Citadel Securities 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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