He enrolled in a National Higher Diploma in Electrical Engineering at Technikon Witwatersrand in 1986 and graduated in 1990.
After completing his National Higher Diploma, Mello attended Washington State University in the United States from 1991 to 1994.
During this time, he completed a B.Sc degree in Electrical Engineering. Mello was a member of the Tau Beta Pi Honor Society and vice president of the African Student Association at Washington State.
He went on to complete an M.Sc at the same university. He began his thesis, entitled “Low-bit rate video coding using arithmetic coded trellis-coded quantizer”, in 1995, and graduated with a Master’s in 1997.
Mello’s fourth qualification came from the Gordon Institute of Business Science (GIBS). He completed an executive development programme: business at GIBS in 2008.