From 2003 to 2013 he collaborated in the offices Atelier Central, Idom/ACXT and Costa Lopes Arquitectos. He developed his own architectural practice OSMD together with Olga Sanina from 2003 to 2014, and he established Marcelo Dantas Arquitectura in 2015. He is assistant professor at the Universidade Lusófona ULHT since 2013.