Manjezi joined up at Scotstoun in 2022 and made 23 appearances for Warriors.
Speaking to the The Bulls" website, Manjezi said: "Coming back home was a definite easy decision, I have lots of good memories from my first stint at the club and now I look forward to working hard to create more.
"Being abroad was good, getting to experience different cultures, people and a way of life. Glasgow is a wonderful club and I enjoyed being challenged and learning in a different environment. The identity there was speed of play and mauling which I've added to my game.
"I hope I can use those learnings and others to help the club as we go into the new campaigns."