Rumbi has over 11 years of experience working in marketing, sustainability consulting, programme coordination, and editing in Sweden, Canada, and Tanzania. Rumbi has worked as a Sustainability Consultant for GSCM UK, the Swedish Government, and Alfa Laval AB. Her experience also includes work as a Marketing Consultant for Leaders on Purpose and as a Programme Coordinator for the Division of External Relations at Lund University. She has sat on the Education board for the International Institute for Industrial Environmental Economics, as well as the Faculty of Engineering board at Lund University. Her achievements include numerous academic honours, scholarships, and accolades. She holds a Bachelor of Arts in Geography (Environment and Sustainability) from the University of British Columbia (Canada) and a Master of Science in Environmental Management and Policy from Lund University (Sweden).