During this period, influenced by Douglas Englebart, who he worked with for a while, he developed an approach mixing hypertext and machine learning, leading to a system called Computer Integrated Documentation. This work led to a major publication on context-sensitive indexing. Back to France, he was nominated leading expert in Information Society and Technology for the European Commission. He served as an expert for the European Space Agency to establish the area of human-machine interaction and artificial intelligence (1991–1992). Creating and developing EURISCO, he became a legal expert for aircraft accident investigations (1992-1994). He then started new investigations in cockpit design and produced the Cognitive Function Analysis (CFA) method that was extensively used in industry for the design of safety-critical systems. Commercial aircraft cockpits became more computerized and generated more studies in human-computer interaction (HCI). He combined HCI and artificial Intelligence approaches not only in the aerospace domain, but also in education through the use of software agents. He also created the Group Elicitation Method (GEM) that is used for knowledge elicitation in HCD, and more specifically in participatory design. He helped in the restructuring of Air France at the highest level using GEM. GEM was used in many industrial settings, e.g., Airbus, Nokia, Daimler, Toyota Europe and in several European Integrated Projects funded by the European Commission. He collaborated to the Handbook of Human-Computer Interaction with a chapter in knowledge elicitation for the design of software agents. He wrote an introductory text under the auspices of UNESCO on theories of human cognition to better understand the co-adaptation of people and technology, in knowledge management, organizational intelligence and learning, and complexity. He coordinated the French Handbook of Cognitive Engineering: A Human-Computer Interaction and Cognition (Traité d'Ingénierie Cognitive: IHM et Cognition). He then contributed to develop the field of HCI in France, and was Co-Founder of AFIHM, the French national equivalent of Association for Computing Machinery SIGCHI. He co-founded the first French ACM SIGCHI local chapter in Toulouse. He was the first French CHI paper Co-Chair (Inter-CHI 1993) with Jakob Nielsen, and was elected Executive Vice Chair of ACM SIGCHI (1995–1999), making him the first European ACM SIGCHI top executive. This service to the HCI community, together with Richard Anderson, contributed to the creation of several local chapters worldwide.