Devota Mdachi started working with TTB in 1994 and was first employed as Tourist Information Officer, at the TTB Branch Office in Arusha. In 1998, she was transferred to Dar es Salaam, and was attached to the Tourist Information Centre. Since then she has worked in various positions at TTB as Senior Tourist Information Officer, Principal Tourist Information Officer, Head of the Dar es Salaam Tourist Information Centre, Principal Marketing Officer, Director of Marketing, and finally Managing Director in 2016. She is the first Tanzanian woman to hold the positions of Director of Marketing and Managing Director of the TTB.

She holds a BA in international relations and advanced French language from the University of Dar es Salaam (1991); an MA in tourism from the Open University of Tanzania (2008), and post-graduate certificate in tourism from the International School of Tourism, Rome (2000).

Devota is dedicated to the development of tourism within Tanzania and in 2019 was recognised as one of the Top 50 Women in Management in Africa.