Accreditation is important for ensuring and sustaining the quality of an educational program, but the process can be challenging. Higher education institutions are open systems that rely on multiple entities, such as faculty members, to assist with the accreditation process. However, there is sometimes a lack of buy-in and involvement from faculty when assisting with accreditation-related tasks. This paper describes a cause-analysis study that was grounded in systems thinking and conducted at an engineering department at a large, diverse public university in the U.S. The study was aimed to reveal interrelated factors influencing the engineering faculty's buy-in and involvement in conducting departmental accreditation tasks. Findings indicate a need to improve the environmental factors, such as provisions of clear communication and suitable resources, as a prioritized intervention to promote faculty's buy-in and involvement. Recommended interventions, possible challenges of implementing them, and implications on managing changes are also discussed.