Oleochemical industry has seen massive growth in Southeast Asia since the 1980’s. However, there is a major problem when it comes to energy optimisation strategies for oleochemical plants, which is apparent by the very limited amount of literature reviews available regarding energy optimisation in the oleochemical sector. This paper aims to propose a solution that leads towards the sustainable development of an oleochemical plant using a mathematical approach. The focus of this work is to increase the cost efficiency of the plant as well as reduce its environmental impact. Three case studies were carried out where Case 1 looks into the reutilisation of waste steam, Case 2 regarding the effects of production capacity changes on energy demand, and Case 3 attempts to create a holistic solution. From the three case studies that were carried out, Case 1 allowed for cost savings of 50.82%, while the entirety of Case 3 allowed for cost savings of 29.56%. Case 2 showed the changes in steam demand given an increase or decrease in production that can be linked to seasonal data of palm oil. Case 2 also accounted for safety factors that were applied in Case 3 to create a more holistic solution.