He studied in the department of architecture and city planning graduating from the academy in 2001. Mattias Agabus is a member of the Union of Estonian Architects. From 2000 to 2001 he worked in the Arhitektuuriagentuur OÜ architectural bureau. Prize new building of the Tallinn University, 2003; 1. Prize library of the Tallinn Technical University, 2006, 1.