Justin has the following academic degree:
Doctor of Litterarum et Philosophiae in Information Science, Rand Afrikaans University, South Africa, 2004.

Dr Chisenga has been quoted has having said during one of his presentations, "that the Open Access Initiative is applicable in numerous fields". He gave an indication of what was happening globally in this area. Saying that "while users are looking for full-text documents, most databases contain only bibliographic references. Most literature is still in print format and difficult to locate, while copies do not always end up in the organization’s library. Additionally, high subscription fees for journals, as well as intellectual property considerations, presented barriers to access. Finally, libraries are often hesitant to move away from paper journals and into online journals due to uncertainty as to permanent access in case they cancel their subscription."

Prior to joining FAO, he was the Automation Librarian at National University of Lesotho in the early '90s and has worked with the Department of Information and Communication Studies at University of Namibia.