Dr. John Justine Villar is currently a Professor and Chair at the Department of Computer Science, College of Engineering, University of the Philippines Diliman.

He is a faculty adviser at the Scientific Computing Laboratory of the Department of Computer Science and a Research and Extension Fellow at the Intelligent Transportation Systems Laboratory of the National Center for Transportation Studies. His research work spans topics in computational biology and optimization models in transportation.

He is involved in various DOST-funded land and maritime transportation research projects such as Project MARIS in 2019-2020, Project PAROLA in 2021, Project MEDIANS in 2022, Project E-TraMS and Project VIROS-ROVE in 2023-2024 and Project ALON in 2024-2025. From these, he is also awarded the Kabalikat Seasoned Researcher award by the Philippine Council for Industry, Energy and Emerging Technology Research and Development of DOST.

He is also a current member of the Interagency Technical Working Group in Active Transport headed by DOH and Chair of TC 93 (Intelligent Transportation Systems) of DTI-Bureau of Product Standards.