Founder and elected Chairperson of the Mitumba Consortium Association of Kenya since January 2020 to date. Teresia is a trailblazer in advocating for fair trade practices within the industry globally, while ensuring transparent policies and procedures for importing second-hand clothes that benefit both traders and consumers. She is a leading voice in Kenya's trade policy discussions affecting the mitumba sector.

She is also the Director of 'Give Hope TV' where she successfully implemented new digital strategies that boosted audience interaction and engagement through social media, live streaming, and on-demand content.

Teresia was appointed to the KNEST Plc Advisory Council in 2023 where she served until her appointment to the KNEST Plc Board on 6th September 2024.