Miriama began her journalism career as a radio announcer and producer at National Radio. She then moved into television in the late 1990s, working for three years as an onscreen journalist and director for the issues and arts programme, Backchat.
She joined TVNZ becoming a reporter for TVNZ's affairs programme, Sunday. She also worked as a backup presenter for ONE News, and Breakfast. She hosted TVNZ's current affairs show 20/20, and was a weekend co-anchor for TVNZ 7's TVNZ News @ 8. In 2010, Miriama and fellow presenter Rawdon Christie anchored the live coverage of the aftermath of the 2010 Canterbury earthquake. From 2015 to 2016 Kamo hosted Kiwi Living a lifestyle programme on TVNZ.
Miriama is a lively and engaging MC and a professional facilitator of workshops, panels and discussion groups.