Emeritus Professor Aiyejina was appointed as a Lecturer at the St Augustine campus in 1998. From there he advanced to the posts and titles of Senior Lecturer in 2001 and Professor in 2006. In 2008, he became the Dean of the Faculty of Humanities and Education, a post that he held for six years. He has also served as the Deputy Dean of Graduate Studies; the coordinator of the Literatures in English programme and the coordinator of the Festival Arts programme.

 As Dean of the Faculty, he made changes and brought forth new ideas that are still in existence today. Some of these include the setting-up of an Academic Advising model which became a best practice model on the campus; the building of a state-of-the-art home for the campus's Film programme; the introduction of Campus Literature Week; and the physical relocation of the Foundation English Language staff onto the main campus. He also laid the groundwork for relationships with various ministries and other local entities such as the Trinidad and Tobago Film Festival and the Bocas Lit Fest. In the posts that he held, Emeritus Professor Aiyejina consistently prioritised capacity building and enriching the capacity of others.

Additionally, Emeritus Professor Aiyejina was appointed as acting Head of the St Augustine Academy of Sport in 2018. He brought with him the vast institutional knowledge that was needed to design an administrative structure to advance not only the Academy, but the entire Faculty of Sport across all campuses. He successfully steered the academy through the COVID-19 pandemic; and he used his literary skills to initiate and edit the Faculty’s fortnightly column in the Trinidad and Tobago Guardian and the Jamaica Daily Gleaner. This columnn led to the publication of Sport Matters - Views from The UWI Faculty of Sport, (2019–2020), which he also edited.

Moreover, Emeritus Professor Funso Aiyejina distinguished himself as a leading scholar, writer, poet, playwriter and filmmaker. He had a passion for writers, writing and the written word. He coordinated and chaired conferences; sat on local and regional committees; contributed academic works; created platforms for others to stand on and ensured that the work of icons was celebrated.

The campus community extends condolences to his family, friends, and colleagues.

Read more on the celebration of Prof Aiyejina's life in this Newsday article.