Kelvin Doe is a young Sierra Leonean self educated engineer. He is known for building at the age of 13 his own auto-produced radio station and broadcasting under the name of Dj Focus. 

Kelvin Doe is born in 1996 in Freetown, Sierra Leone. He learned engineering alone and at the age of 13 he realised his own radio station, where he plays music and broadcasts news under the name of "DJ Focus." He uses discarded pieces of scrap to build transmitters, generators, and batteries, and many other incredible elctronic devices.

As a result of his accomplishment, he received many awards and acknowledgements and subsequently became the youngest person to participate in the "Visiting Practitioner's Program" at MIT, in the USA. Now Kelvin came back to Sierra Leone and is working on many projects to better the conditions of life of his people.