Nikolaos Aletras

I'm a Lecturer in Natural Language Processing in the Computer Science Department of the University of Sheffield, co-affiliated with the Machine Learning (ML) group. Previously, I was a Lecturer in Data Science at the Information School, University of Sheffield. I've gained industrial experience working as a scientist at Amazon (Amazon Research Cambridge and Alexa). I was a research associate at UCL, Department of Computer Science, Media Futures Group. I completed a master's and a PhD in Natural Language Processing at the University of Sheffield, Department of Computer Science and I was an undergraduate student at the University of Crete, Department of Computer Science.

My research interests are in NLP, Machine Learning and Data Science. Specifically, I'm interested in applying statistical methods for detecting and interpreting the underlying topics in large volumes of text data. I also develop text analysis methods to solve problems in other scientific areas such as (computational) social and legal science. For more details, see my CV.

If you are interested in doing a PhD with me, look at a list of potential research topics and drop me an email (

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