The world is faced with the COVID-19 pandemic which has held the economy, especially the educational sector to ransom. School closure, reliance on e-learning and inaccessibility to mitigation strategies are some of the changes and disruptions which the COVID-19 pandemic has brought in the educational sector. This study examines the impact of COVID-19 pandemic on sustainability of Nigerian tertiary institutions, with particular reference to University of Jos. Three research questions were set to guide the study. Cross sectional survey was employed for the study. Data was generated from both primary and secondary sources through the use of Tertiary Institutions Sustainability Checklist (TISC). The population used for the study involved the administrative staff of the University. A sample of 30 (thirty) participants were used for the study. All the sampled staff were given the TISC to fill. Random sampling technique was used for the study. Simple Percentage was used to analyze the research questions. It was found that many tertiary institutions do not have well equipped library for their students and they have poor or non existing internet connectivity, poor ICT laboratory amongst a host of other issues. The study recommends that tertiary institutions should adopt policies the use of modern resources such as the e-library, computers for Skype and zoom to rebuild the losses in the learning process of their students, once they reopen.