Machine Learning Researcher - PhD Intern (US)

Job Description At Citadel Securities, a leading global market maker, our team of quantitative researchers models the markets and brings trading strategies to life every day. Specifically, the goal of this team is to leverage and tailor the state-of-the-art machine learning and AI algorithms to modernize the quantitative trading industry. We're looking for extraordinary and highly motivated researchers who are excited about solving challenging problems and iterating in a fast-paced environment. As an intern, you'll get to challenge the impossible in research through an 11 week program that will allow you to collaborate and connect with senior team members. In addition, you'll get the opportunity to network and socialize with peers throughout the internship. Our signature internship program takes place June through August. Occasionally, we can be flexible to 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 various kinds of datasets through innovative and rigorous research Implement algorithms in high-quality code Work with large data sets, 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 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 An 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 available in Miami and New York. 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 in 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 .

Created: 2026-03-04