 He is credited for producing compilation albums called 'Kenyan, The First Chapter' and 'Kenyan, The Second Chapter'.The two albums featured Hardstone, Kalamashaka, Gidi Gidi Maji Maji, Necessary Noize, In-Tu, Jimmy Gathu, Maina Kageni, Pete Odera, Ndarling P and Ugandan musician Kawesa

Josiah is also the founder of Kisima Awards, the premier annual musical awards held in Kenya.He was given producer of the year prize at the Kisima Awards in 2004, but he rejected it citing his position as an organiser of the awards.