Mr. Seoane has a Bachelor's degree in Architecture from the University of Santiago (1987), and a Master's degree from Columbia University. USA (1991). He has also completed post-graduate studies at the Escola das Artes e Design, in Porto, Portugal (1993).

Mr. Seoane is now the Associate Professor of Construction at the Coruña University School of Architecture.
In 2010, Carlos Seoane became the director of the Compostela Architecture Foundation and the CAinstitute, focused on developing international architectural programs in Galicia, such as the COMPOSTELAs summer program.

Mr. Seoane has professionally collaborated with leading architects. In the United States, he worked with Viñoly Architects on the design of the Tokyo International Forum. In 1993, Mr. Seoane moved to Portugal to collaborate with Alvaro Siza on the School of Journalism project in Santiago and oversaw its construction until 2000. Mr. Seoane started his independent studio in 1997 and, since then, he has also collaborated with David Chipperfield on the Corrubedo House project, and with Eisenman Architects on the City of Culture, in Santiago.

In 2018, Mr. Seoane was awarded the 2C Europe Award for public space. and the Galician Association of Architects Prize in the years: 2001, 2015 and 2017. His professional work has also been recognized with the FAD award in 2016 for Public Space Design, and he has received the Juana de Vega Award 2010 for Best Private Residence. His work has been exhibited at the Venice Biennale and the International Architectural Biennial in Argentina.
In addition, Mr. Seoane has collaborated in the publication of several books, including: "FCI - Siza" “Siza - Fundación Ibere Camargo”, “Souto de Moura - Metro de Oporto” and articles in magazines such as: “Casabella”, “Pasajes” and “Obradoiro”. In 2002, he contributed to the television show “Santiago, Ciudad contemporánea” for the Spanish TV channel “RTVE2”.