Over 28 Years experiences of project business development, benchmarking, business planning, project overall scheduling, project controlling, design review, execution in refinery process such as CDU,FCC,RHDS,SRP,MDU,ARU,SWTU,SCTU,Alkylation,MTBE,SAR, Tankage, Utility and Jetty as a process engineer, operation engineer, operation manager, and technical manager not only in SK Energy which is the largest oil refining and petrochemical company in Korea, but also other various overseas refinery company and petrochemical plants in the world.As an O&M (Operation and Maintenance) operation Manager, who has performed project execution, operation management and execution service as well as O&M Service Promotion in Ghana and Singapore.• As an operation Manager, performed project execution, maintenance execution,construction, pre-commissioning, commissioning and start-up and trouble shooting at SK Energy as well as in TOR, Ghana as well as in JAC, Singapore.- Overall project scheme study, benchmarking and development including planning, schedule, capital cost and economics evaluation - New Biz development and decision making for profitability and reliability of operation- Process technology review, monitoring and providing operation guideline - Improving unit efficiency including product yields, cost and energy saving- Process and catalyst performance monitoring for on-going optimization- Set up startup schedule, developing S/U, S/D operation procedures - Revamp study, process feasibility study, commissioning of minor and mega project - Reviewing the design packages from both the licensors and the detailed engineering.- Developing punch lists during the construction phase to ensure quality control.- Participated in turnaround and performed inspection work.- Reviewing integration works between A and B Refining units- Evaluating and reviewing technical matters including catalyst evaluation and performance