 Complete the following phrase:  Marwa has served as a FIFA referee since 2011. He is the first Kenyan football official to be involved in any FIFA competition, having featured in the 2011 FIFA U-17 World Cup. He was named as an assistant referee in the 2012 and 2013 Africa Cup of Nations. Marwa was named as a reserve official at the 2014 FIFA World Cup and an assistant referee at the 2016 FIFA Club World Cup. He was included as CAFs assistant referee in the 