This study assessed the impact of Project Management Methodologies (PMMs) on project success in the oil and gas industry in the Kingdom of Bahrain. It also explored the different project methodologies used along with their strengths and weaknesses. Quantitative approach with the support of qualitative interviews was used to achieve the objectives of this research. A total of 95 survey responses were received and 17 interviews were conducted. This study revealed that comprehensive and applied PMMs have significant impact on project success whereas supplemented PMMs have insignificant relationship with project success. The analysis showed that one unit change in the application of relevant PMM elements throughout the project life cycle has 32.3% impact on project success whereas one unit change in the application of comprehensive PMM elements has 27% impact on project success.

Keywords : Project Success, Project Management Methodologies, Oil And Gas, Bahrain