Resource leveling is a management technique that is used to manage resource use in the course of project implementation. Resource leveling is crucial in any construction and engineering project since it defines the time and cost line for the project as well as its profitability. Primavera P6 is among the best project management software with tools for managing and leveling resources. This paper also explains various techniques of resource leveling in P6 and the circumstances under which they are useful. This paper compares the automated and manual approaches of resource leveling, resource leveling about other facets of project management, and the practical measures that must be followed to enhance the use of P6 for project resource management and, consequently, improved project outcomes.