Dr Isaga studied Advance Diploma in Certified Accounting at the Mzumbe University (by then called IDM Mzumbe). Isaga joined the Mzumbe University in 2001 where she started to work as a Tutorial assistant. After obtaining her Masters degree from Birmingham City University, UK she was promoted to an Assistant Lecturer and later to a rank of Lecturer after obtaining a Doctorate from VU university, Amsterdam the Netherlands. In 2013 she was appointed as Associate Director in the Directorate of Quality assurance, and served in that position for one year before appointed to be an Acting Director in 2014. Being Director of Quality assurance, Isaga is responsible to promote and coordinate all quality assurance issues at university level with a role of determining whether or not quality standards set internally for measuring performance in all core operational areas are constantly met and updated. Furthermore, she is responsible to ensure that the university meets the requirements and standards set by the regional and national organs dealing with quality assurance as well as follow the process of continuous improvement in teaching and learning process. Dr Isaga has been attending various quality assurance training both in and outside Tanzania. Furthermore, She has been facilitating training on University quality assurance to various cadres. Isaga is a member of the Tanzania Universities Quality Assurance Network, East Africa Universities Quality assurance Network, Tanzania Revenue Authority Board. Furthermore she is a secretary of Mzumbe University Quality assurance Committee and a Chairperson of the standing Committee of the Tanzania Revenue Authority Board. Isaga has attended many international seminars and conferences and published four articles in the international journals (e.g. Journal of Entrepreneurship in Emerging Economies, International journal of business and Management). Her main research focus is Accounting and Finance, quality assurance, Entrepreneurship and Small and Medium-Sized Enterprises (SMEs), with special reference to growth.