Chomba's mother grew capsicum and French beans on a small plot of land owned by a step-uncle and created a farming cooperative.
[2] When Chomba was nine, a local boarding school rejected her due to her poverty, so she attended one further away, in Western Kenya.
When her mother was no longer able to afford to send her there, Chomba returned to Kirinyaga to attend the provincial high school.
[2] Although Chomba had hoped to study law or agricultural economics, she was placed in a forestry course at Moi University.
[2][3] In 2021, Chomba joined the World Resources Institute as their Director of Vital Landscapes for Africa, where she leads their work on "Forests, Food systems and People.