This paper investigates the optimization of engineering management strategies for infrastructure construction projects within Petroleum Development Oman (PDO), focusing on critical constraints such as time, cost, and scope. Given the complexities of large-scale projects in the oil and gas sector, the study employs a mixed-methods approach to provide a comprehensive understanding of these challenges. The research reveals a strong linear relationship between project constraints and overall performance, highlighting the vital role of effective management practices. Key findings emphasize the need for comprehensive and adaptable planning processes, enhanced resource competency through targeted training, and tailored contract management to align project objectives with stakeholder expectations. The study also advocates for hybrid project delivery approaches, combining Agile flexibility with Waterfall structure to better manage changing requirements while controlling timelines and costs. The paper concludes with actionable recommendations to improve project outcomes for PDO, including strategies to reduce delays, control costs, and increase stakeholder satisfaction. Implementing these recommendations can enhance PDO’s project efficiency and effectiveness, reinforcing its reputation as a leader in successful project delivery. The insights gained are poised to inform future project management practices at PDO and contribute to the broader field of engineering management in the oil and gas industry.