Abisai Simon Malela attended MATI Uyole in Mbeya, where he received a certificate in Agriculture. Before beginning to work for TREES, he had several field practical training experiences. He worked with Kilombero Sugar Company in Morogoro as a Haulage clerk and at DASAM Agrovet Company as a Team Leader. He joined TREES in 2016 and is fluent in both Kiswahili and English.