The study explores the implementation of community extension programs among selected State Universities and Colleges (SUCs) and Private Higher Education Institutions (HEIs). It utilized the descriptive research design, specifically the Interpretative Phenomenology and Grounded Theory approaches. The province of Bukidnon was the location of the study. The researcher conducted the face-to-face interview and participated by six informants identified as the head of the office, those in charge, or the coordinator implementing extension programs. The researcher determined the sample size in a saturation manner. The processes of Grounded Theory, such as Open coding, Axial coding, Selective coding, and Theory, were used to record, transcribe and afterward analyse statements. The study revealed the following significant themes: The Purpose of Community Extension, Challenges in the Implementation, Addressing Challenges in the Implementation, Best Practices, and The Essence of the Experiences. In addition, the study pointed out that several implications for implementing extension programs were public service, fostering partnership, sustainable development, and enhanced experiences. The study also shows a relationship between policymakers, educators, and communities. Finally, the results generated an Extension Sustainability Theory brought about by social, economic, and political factors.