Department Directory

Thorsten Joachims is the Jacob Gould Schurman Professor of computer science and information science at Cornell University. He has also served as the interim dean for Cornell Bowers and as associate dean for research and as chair of the Department of Information Science. He is the director of the Cornell AI Initiative and Radical Collaboration. He has served as program chair of the ICML, KDD, and RecSys conferences, and he is a member of the IMLS Board and the SIGKDD Executive Committee. Thorsten Joachims joined Cornell in 2001 after finishing his Ph. D. as a student of Prof. Morik at the University of Dortmund, from where he also received a Diplom in computer science in 1997. 

Wendy Ju is a professor of information science at Cornell Tech, the Cornell Ann S. Bowers College of Computing and Information Science, the Jacobs Technion-Cornell Institute, and the Technion-Israel Institute of Technology.

Ari Juels is the Weill Family Foundation and Joan and Sanford I. Weill Professor of computer science at Cornell Tech, the Cornell Ann S. Bowers College of Computing and Information Science, and the Jacobs Technion-Cornell Institute. He is co-director of the Initiative for CryptoCurrencies and Contracts (IC3). He is also the chief scientist at Chainlink Labs.

Malte Jung is an associate professor of information science at Cornell University and the Nancy H. ’62 and Philip M. ’62 Young Sesquicentennial Faculty Fellow. He directs the Interplay Research Studio that explores the interplay between people and automation.

Kallus's research revolves around data-driven decision making in operations, the interplay of optimization and statistics in decision making and inference, and the analytical capacities and challenges of unstructured, large-scale, and web-based data. His works span basic theory, effective methodology, and novel applications and has been recognized by awards.

Nathan hails from the town of Haifa, Israel. He holds a PhD in Operations Research from MIT as well as a BA in Pure Mathematics and a BS in Computer Science both from UC Berkeley. Previously, Nathan has been a Visiting Scholar at USC's Department of Data Sciences and Operations and a Postdoctoral Associate at MIT's Operations Research and Statistics group.
 

Michael Kim is an assistant professor of computer science. His research investigates foundational questions about responsible machine learning. Much of this work aims to identify problematic behaviors that emerge in machine-learned models and to develop algorithmic tools that provably mitigate such behaviors. More broadly, he is interested in how the theory of computation can provide insight into emerging societal and scientific challenges.

Jon Kleinberg is a professor in both computer science and information science. His research focuses on issues at the interface of networks and information, with an emphasis on the social and information networks that underpin the Web and other online media. His work has been supported by an NSF Career Award, an ONR Young Investigator Award, a MacArthur Foundation Fellowship, a Packard Foundation Fellowship, a Sloan Foundation Fellowship, and grants from Google, Yahoo!, and the NSF. He is a member of the National Academy of Sciences, the National Academy of Engineering, the American Academy of Arts and Sciences, and the American Philosophical Society.

Robert Kleinberg is a professor of computer science at Cornell University and a member of the field of information science. His research studies the design and analysis of algorithms and their applications to electronic commerce, networking, information retrieval, and other areas. Prior to receiving his doctorate from the Massachusetts Institute of Technology in 2005, Kleinberg spent three years at Akamai Technologies, where he assisted in designing the world's largest Internet Content Delivery Network. He is the recipient of a Microsoft Research New Faculty Fellowship, an Alfred P. Sloan Foundation Fellowship, and an NSF CAREER Award.
 
 

Allison Koenecke is an assistant professor of information science at Cornell Tech and the Cornell Ann S. Bowers College of Computing and Information Science. Her research on algorithmic fairness applies computational methods, such as machine learning and causal inference, to study societal inequities in domains from online services to public health.

Dexter Kozen is the Joseph Newton Pew, Jr. Professor of Engineering Emeritus in the Department of Computer Science. His research interests span topics on the boundary of computer science and mathematics: design and analysis of algorithms, computational complexity theory, complexity of decision problems in logic and algebra, and logics and semantics of programming languages. He is the author of more than 200 research articles and four books. Kozen is a former Guggenheim fellow and a fellow of the Association of Computing Machinery, the American Association for the Advancement of Science, and the European Association of Theoretical Computer Science. He is a recipient of the John G. Kemeny Prize in Computing, an IBM Outstanding Innovation Award, the EATCS Award, the IEEE W. Wallace McDowell Award, and the ACM Alonzo Church Award.

Volodymyr Kuleshov is the Joan Eliasoph, M.D. Assistant Professor of Computer Science at Cornell Tech, the Jacobs Technion-Cornell Institute, and the Cornell Ann S. Bowers College of Computing and Information Science. He obtained his Ph.D. in computer science from Stanford University, where he received the Arthur Samuel Best Thesis Award.

Owolabi Legunsen is an assistant professor of computer science. He is part of the Software Engineering Group and is broadly interested in research on software engineering, with a focus on software testing and runtime verification. Legunsen completed his Ph.D. in computer science at the University of Illinois at Urbana-Champaign, his master's degree in computer science at the University of Texas at Dallas, and his B.Sc. in computer engineering at Obafemi Awolowo University, Nigeria. He has received three ACM SIGSOFT distinguished paper awards (ASE 2016, ISSTA 2023, ISSTA 2024), an NSF CAREER Award, an Intel Rising Star Faculty Award, and a Microsoft Faculty Research Fellowship Finalist designation.

Sorin Lerner is the dean of the Cornell Ann S. Bowers College of Computing and Information Science, appointed Nov. 1, 2025. A professor of computer science, his research focuses on providing programmers with tools to make software more secure and reliable. 

Wei-Chiu Ma is an assistant professor of computer science at Cornell University. His research lies at the intersection of 3D/4D computer vision and robotics. He is interested in building AI systems that can understand, reconstruct, and re-simulate our dynamic world, and leveraging these capabilities to enable more robust autonomous systems or advanced entertainment applications.

Steve Marschner is a professor of computer science, and currently serves as the associate dean for research in the Ann S. Bowers College of Computing and Information science. His research and teaching are in computer graphics and vision, centered around how optics and mechanics determine the appearance of materials, with interests in realistic rendering, material models (optical and mechanical), appearance capture, simulation, and computational photography. Some questions that run through his work are “How can we get objects to appear to be made from exactly the right kind of material?” and “How can we cleverly use cameras to help us measure the information we need to make great images?”