He is professor emerita in the Department of Applied Curriculum Studies: Mathematics Education, University of Stellenbosch and University of KwaZulu-Natal, South Africa. His researches include Mathematical proof, Geometry, and Modeling. With more than 1800 citations of his works, He is widely known as one of the experts in Mathematical Proof. He worked with some of extraordinary people in the field, such as Gila Hanna and David A. Reid. Some of his notable works are "The role and function of proof in mathematics", "Rethinking proof with Sketchpad", "To teach definitions in geometry or teach to define?", "An alternative approach to proof in dynamic geometry","Some Adventures In Euclidean Geometry", and "Proof Technology in Mathematics Research and Teaching".
He is known as a mathematician and a philosopher of mathematics who has a great interest in ethnomathematics, which is a field of science that studies mathematics and its application (which is applied) to certain cultural groups. His interest in mathematics is proven through his writings and seminars where he is a resource person. Several scientific journals related to ethnomathematics published in the country use Marsigit's thoughts and writings as references. In 2018, Marsigit officially served as President of the Ethnomath Association. In addition to carrying out his role in the fields of research, community service, and higher education, as an expert in mathematics education, Marsigit is also active in writing mathematics books for primary and secondary education. Some of his books are written in Indonesian, others in English.
She is a doctorate in mathematics education, Faculty of Teacher Training and Education, Sriwijaya University. She currently serves as vice dean for administration and general affairs. Her research interests are mathematical value in mathematics education, action classroom research, development of teaching materials, higher order thinking, and problem solving. Her teaching interests are Analytic Geometry, Curriculum, and Qualitative Research Methods.