Mariam Issoufou Architects (formerly atelier masōmī) is an architecture and research firm founded in Niger, in 2014, by Mariam Issoufou.

The firm tackles public, cultural, residential, commercial and urban design projects. The firm’s completed projects include the Hikma Community Complex, a library and mosque complex in Niger, which won two Global LafargeHolcim Awards for sustainable architecture. Other completed projects include Niamey 2000 Housing, a response to Niger’s housing crisis which was shortlisted for the 2022 Aga Khan Award for Architecture. Upcoming projects include the Yantala Office in Niger, the Ellen Johnson Sirleaf Presidential Center for Women and Development in Liberia, and Bët-bi Museum in Senegal.

 In 2024, the firm celebrated its 10th anniversary with an expansion that included satellite offices in New York and Zurich. The firm’s expansion embodies the evolution of founder and principal, Mariam Issoufou, as an academic and architectural leader who puts intersectional sustainability at the heart of all projects. Issoufou is a professor of Architecture Heritage and Sustainability at ETH Zurich. She previously occupied academic roles as adjunct associate professor of Urban Studies at Brown University and as the 2021 Aga Khan critic at Harvard Graduate School of Design. Issoufou is a 2019 Laureate of the Prince Claus Award. She was named as one of 15 Creative Women of Our Time by the New York Times. The firm has been on the AD100 list since 2021.