Tamrini brings over 30 years of experience in forestry and specialized wildlife management and conservation. He leverages this experience to engage in local consultancy work on climate change, social research, and project management for Terra Global. Tamrini has made outstanding contributions within his forestry roles, predominantly in afforestation, forest plantation management, and wildlife resource management. Additional experience of Tamrini includes District Forest Officer of Central and North B, Head of Unguja Ukuu Forest Plantation, Masingini Natura Forest Reserve, and Chaani Forest Plantation. He facilitated the project of the Kiwengwa-Pongwe Forest becoming a Forest Reserve and introduced ecotourism as its main livelihood. In 2019, Tamrini managed the preparation of detailed policies and regulations on Zanzibar for the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES). Tamrini was appointed a member of the Tanzania National REDD+ Task Force and, during that time, created a Tanzania National REDD+ Strategy Document. Due to his commitment to REDD+ programs, Tamrini became a member of an International REDD+ Safeguards Steering Committee and served for three years. Tamrini was recommended to be an Interim Board Member of the Tanzania National Carbon Monitoring Centre (NCMC) hosted at Sokoine University of Agriculture (SUA).