Chennoah is a campaigner and community organiser with experience in Aotearoa and Australia. She grew up in Tauranga and has spent most of her professional life in Te Whanganui-a-Tara, where she moved for university. She graduated with an LLB and a BA with majors in political science and international relations.

Chennoah has been an active member of Amnesty International for 15 years, joining at the age of 13. She first got involved with the Amnesty group at Tauranga Girls' College and with the Tauranga Moana group. She went on to convene the Tauranga Girls' group and the Victoria University Amnesty group once she moved to Wellington.

In 2013, Chennoah became a Youth Cooptee on the Amnesty Board and was elected as a full member in 2016. While on the board, Chennoah was appointed as a "Youth Twin" to the International Board, an initiative which connected International Board members to a youth leader to facilitate two way dialogue around meetings. She went on to join the international working group for the development of a global international youth strategy.