Kamwathi’s work has been exhibited in numerous venues around the world including Kenya, the UK, the USA, Holland, Austria, El Salvador and Finland. He has participated in several residencies, including the Fontys Academie Kenya-Holland Exchange in 2003, Artists in Residence at the University of Kentucky, USA in 2005, printmaking residencies at the London Print Studio and Bath Spa University College in 2006, the Thupelo International Artist workshop in South Africa 2006, and Art Omi 2009 International Artists Residency, New York. He was part of the Nairobi Art Trusts’ Amnesia Project and the Jet-Lag experiment project in 2008 and 2009 and exhibited at the 2010 and 2014 Dakar Biennale, Senegal. He continues to participate in several residencies in Europe and the US.