The successful delivery of mega projects is a challenging terrain. ADMA-OPCO continues to face numerous challenges of providing technical assurance to multiple mega projects running in parallel while meeting not only short and medium term expansion goals, but also ensuring a sustainable long term future. The objective of this paper is to share ADMA-OPCO’s experience and success factors in driving Technical Assurance during projects execution. At ADMA OPCO, the Discipline Engineering Division (DED) acts as the center of technical expertise in support of all ADMA’s business activities and in particular, in the delivery of the ongoing complex project programs. The DED is part of the Projects and Engineering Business Unit, in a seamless integration with the multiple project teams. DED is a custodian of Technical Assurance,Providing engineering & subject matter experts (SME) expertise to projects,Participating in project reviews and witnessing selected functional and performance testsDeveloping and updating relevant engineering technical codes & standards and assuring their compliance in all ADMA-OPCO projectsBeing actively involved in the technical evaluation and selection external contractors,Reviewing and evaluating project changes through a Management of Change (MOC),Ensuring consistency across projects in terms of technical compliance,Being actively involved in all project phases from idea development to execution,Managing inter projects interface issues utilizing access to overall long term plansActing as an authority for novel technology selection and adoptionAssuring the continuous improvement of the technical skill set within the company. At ADMA OPCO, the current organizational setup of an integrated technical assurance provider and project teams is a model that is proving to be successful when executing multiple parallel mega projects.