John Mapumba worked part-time for Frontier Trucks & Spares from 10-03-2008 until 30-11-2010 to gain experience in the mechanical field on heavy duty trucks. He completed a basic training course with them and worked full-time during holidays. He is described as a fast learner, hard worker, and very eager to learn more. He is now regarded as a diesel and petrol mechanic according to the excellent progress he demonstrated.