Jonase is a medical doctor, graduated with Bachelor of Medicine and Bachelor of Surgery degrees from the University of Zimbabwe. He also holds a Diploma in Anaesthetics and is currently pursuing a Masters Degree in Anaesthetics and Critical Care. Jonase serves as the Chairman of the Board of the Health Volunteers for Africa Trust, a registered not for profit organisation aiming to improve health dispensation to poor and marginalised communities. He is an avid soccer and rugby supporter. Jonase is married and has three children.