Managing a modern university that applies various international standards (world class university) must pay attention to many important factors, including sustainability. Universitas Diponegoro (Undip) Semarang, Indonesia as a public university legal entity that also has a vision of becoming a research university is well aware of the importance of establishing sustainable campus. This paper describes sustainability program of Undip called UNITY, which stands for Undip Initiative for Sustainability. This program refers to five main factors, namely infrastructure, energy and climate, waste, water, and transportation. This paper briefly discuss planned activities of each factor. The program which is fully supported by all components of Universitas Diponegoro, aims to create a campus that is clean, healthy, comfortable, safe and sustainable.