Stephan Oepen

Stephan Oepen is a Professor at the Department of Informatics, University of Oslo, specializing in Computational Linguistics and Natural Language Processing (NLP). He leads the Research Group for Language Technology and serves as Academic Chair in Artificial Intelligence for the Circle U European University Alliance. His research bridges formal linguistics with large-scale computation, focusing on semantic parsing, dependency structures, and multilingual language models.

• 2002–present: Researcher → Professor at UiO
• 2011–2017: Head of Language Technology Research Group
• 2019–20: Section Head for Machine Learning
• 2021–24: Department Head for Informatics

Current projects include HPLT (High-Performance Language Technologies), Nordic Language Processing Laboratory (NLPL), and OpenEuroLLM. He co-directs the 2017 ACL Shared Task on Extrinsic Parser Evaluation and contributes to international NLP conferences like ACL, EMNLP, and CoNLL.

Recent publications focus on:

• Uniform semantic graph representations
• Hybrid parsing architectures
• Continual training for small languages
• Diagnostic parser evaluation
• Copyright implications in LLMs
• Community language resource infrastructure

He actively participates in editorial boards and technical coordination roles, including the LUMI Scientific Advisory Group and Horizon Europe's High-Performance Language Technologies project.