During this time, he performed extensive teaching duties at several Southeast Asian Universities, especially at the Chulalongkorn University in Bangkok and at the Gadjah Mada University in Yogyakarta. He also started and maintained a close research collaboration with the University of Oxford, including multiple research stays at the University of Oxford resulting in several joint publications in the following years. During these years, also Klaus R. Liedl's interest in biomolecular systems arose, which grew ever since and evolved into the major focus of his research. He has developed and employed a broad spectrum of theoretical and computational methods focusing on molecular interactions and biological systems. Klaus R. Liedl has been tackling scientific questions in close collaboration with academic and industrial partners, ensuring feedback from experimental groups. He has been applying his knowledge and analysis tools to chemical interactions to understand biological interfaces.