- Principal Scientist with the focus on Urban Informatics via Digital Twins- Lead developer of Vizzio's "Digital Twin Explorer" platform

- Project Leader of the Collaborative Interactive Visualisation and Analysis Laboratory (CIVAL) group at ETH Zürich: Future Cities Laboratory in Singapore - Project Coordinator and lead developer of the "Singapore Views" platform (an interactive 3D-4D visualisation and presentation platform for urban planning and architecture) at ETH Zürich: Future Cities Laboratory in Singapore - Principal Investigator of the "Cooling Singapore" project- Development Researcher for the "Natural Capital" project- Publication: F. Benita, J. Perhac, B. Tuncer, R. Burkhard, S. Schubiger: 3D-4D visualisation of IoT data from Singapore’s National Science Experiment, Journal of Spatial Science, 2020, DOI: 10.1080/14498596.2020.1726219

- Project Coordinator of the Collaborative Interactive Visualisation and Analysis Laboratory (CIVAL) group at ETH Zürich: Future Cities Laboratory in Singapore - Project Coordinator and lead developer of the "Singapore Views" platform (an interactive 3D-4D visualisation and presentation platform for urban planning and architecture) at ETH Zürich: Future Cities Laboratory in Singapore - Hobby Project: city-scale Virtual Reality- Publication: R. Burkhard, J. Perhac, S. Schubiger, S. Asada, A. Troyanov, S. Zhong, Y. Jiang, "4D-UX: User Experience Design Principles for Coupling Multidimensional Visual Representations in Presentations", Information Visualization, Graphicslink, 2018, DOI: 10.1109/iV.2018.00071

- Data visualization specialist at ETH Zürich: Future Cities Laboratory in Singapore responsible for the R&D of methods and tools for city-scale, 3D visualization of big urban data, enhanced by Virtual Reality and natural gestures- Hobby Project: collaborative VR- Publication (Best Paper Award): J. Perhac, W. Zeng, S. Asada, R. Burkhard, B. Klein, S. Mueller Arisona, S. Schubiger, "Urban Fusion: Visualizing urban data fused with social feeds via a game engine", Information Visualization, Graphicslink, 2017, DOI 10.1109/iV.2017.33

- Research Fellow responsible for implementing of an augmented and virtual reality "Seeing Through" project for medical procedures and training; in collaboration with Imperial College London (UK) and Lee Kong Chian School of Medicine (Singapore)- Hobby Project: dynamic VR telepresence - Publication: A. Granados, J. Perhac, L.V. Rosby, Y.M. Lee, G.W.L. Tan, T.C. Tan, J. Hiham, N. Thalmann, N. Low-Beer, F. Bello, "See-through Visualisation for Training and Assessing Unsighted Physical Examinations", Eurographics, 2017, DOI:10.2312/vriphys.20171087

- Scientific Programmer responsible for the development and deployment of a software tool for processing of multi-modal 2D and 3D image acquisitions and holographic visualization of cerebral aneurysms and arteriovenous malformations via an autostereoscopic 3D monitor in hybrid interventional suites at University Hospitals of Geneva (HUG), Switzerland- Publication: J. Perhac, J. Spaltenstein, V.M. Pereira, K. Schaller, O. Brina, I. Cabrilo, O. Ratib, "Improving workflows of neuro-interventional procedures with autostereoscopic 3D visualization of multi-modality imaging in hybrid interventional suites.", International Journal of Computer Assisted Radiology and Surgery, 2016, DOI: 10.1007/s11548-015-1268-0

- Postdoctoral Researcher Fellow with focus on heterogeneous High Performance Computing, mobile and distributed GPGPU and cloud computing at HPC Lab - Dept. of Computer and Information Science (IDI), Norwegian University of Science and Technology (Norway)- Publication: J.L. Vázquez-Poletti, J. Perhac, J. Ryan, A.C. Elster, "THOR: A Transparent Heterogeneous Open Resource framework", IEEE International Conference On Cluster Computing, 2010, DOI: 10.1109/CLUSTERWKSP.2010.5613099