Markus Ray, joined the AIT Austrian Institute of Technology in 2004, where he heads the Competence Unit "Digital Resilient Cities" - an interdisciplinary team of more than 50 engineers and scientists. The Digital Resilient Cities Competence Unit supports cities and their stakeholders in the cross-sectoral transformation process, primarily combining climate, energy, mobility and urban planning expertise. In the associated City Intelligence Lab, researchers combine innovative processes with state-of-the-art digital planning tools using big data and artificial intelligence for co-creative urban planning. Ray studied electronics with a specialization in computer and systems engineering. His field of expert is about mobility data acquisition and analysis using various sensor and data technologies. He researched innovative solutions for collecting and analysing individual passenger mobility in the multimodal transport system. He used various sensor systems for active mobility data acquisition such as GPS, video, Wifi, infrared, cell phones and smartphones. On the other hand, he used high-performance computing and big data technologies to enable infrastructure-based data sources such as from mobile phone data and floating car data for mobility research. In 2012, he was promoted to Senior Research Engineer and subsequently took over the management of the Mobility Data Acquisition and Analysis research group. In 2017, he took over the management of the Competence Unit in the field of multimodal transport system modelling and optimization, which was expanded in 2021 together with the Competence Unit Digital Resilient Cities.