Johan Khalil Mas'od has been working with PETRONAS for 12 years, specializing in Cost Engineering discipline covering Oil & Gas, Upstream & Downstream development. Throughout his tenure, he has grown within the organization and held various positions & roles such as Cost Engineer (domestic and international projects which includes PETRONAS Operation in Turkmenistan), Project Engineer & Company Site Representative (for PFLNG1 Relocation Project), Manager of Cost Engineering - Upstream, and the most recent is Staff Cost Estimation.