Purpose: The purpose of the study is to develop an organizational and management model for the Plant Turnaround Maintenance in Malaysian Process-Based Industries using management functions of leading and performance of plant turnaround maintenance whereas team alignment is used as mediator. Design/methodology/approach: The study uses quantitative approach using survey questionnaires for collection of primary data from the respondents working in the large and technological advance process based industries of Malaysia. Mostly these large and technological advance organizations carries plant turnaround maintenance. The survey questionnaires were distributed to about 96 companies belonging to different sectors of Malaysian Economy. These includes oil and Gas companies, petrochemical companies, Power Plants, Palm Oil Plant and cement Plants. The response rate was 32%. Findings: The results show that the leading plays a vital role in the enhancement of the performance of the plant turnaround maintenance using team alignment as a mediator. Research limitations/implications: The study intends to validate the developed model on larger sample size. Moreover, the study also proposes to investigate whether or not the findings can be of any help to industrial projects other than plant turnaround maintenance. Practical implications: The Plant Turnaround Maintenance management spent maximum of its time on planning but most of the time the project could not achieve the stated goals. The execution phase of the plant turnaround maintenance is very critical as the leading of the process has high effect on overall project, therefore the proposed model in this research can be helpful to achieve the goals effectively and efficiently. Originality/value: The literature available on management functions and project management techniques and phases are abundant, however, few studies are available on the degree of management functions used in different phases of the plant turnaround maintenance. Keywords: Shutdown; Team Alignment; Leading; Performance; Mediation; Plant Turnaround Maintenance, Introduction The process based manufacturing and production businesses uses huge quantities of the unrefined feedstock to produce the required chemicals and products through application of the mechanical, physical and chemical [...]