Process Systems Engineering and Safety (ProSES) is a biennial conference organised by the Process Systems Engineering & Safety (ProSES) Research Group, Faculty of Chemical and Process Engineering Technology, Universiti Malaysia Pahang Al-Sultan Abdullah, Malaysia. The ProSES Research Group had previously organised the 1st ProSES Symposium in 2019, the 2nd ProSES Symposium in 2021, and the 3rd ProSES Symposium in 2023. It is our pleasure to announce the 4th ProSES Symposium which will be held on 3rd September 2025. The theme of the symposium for this year is "Artificial Intelligence (AI) Innovations and Challenges in Process Industries".