He joined fellow countrymen Juan Román Riquelme, Gonzalo Rodríguez, Rodolfo Arruabarrena, Fabricio Fuentes and Mariano Barbosa.
During the 2009 Clausura, he was part of the squad that won the Argentine league championship, but did not participate in any of the games due to an injury he had suffered at the end of the previous tournament.
[4] Somoza debuted for Argentina by then new manager Alfio Basile in the friendly international against Brazil at the Emirates Stadium in London, England during 2006.
After four years, the midfielder rejoined the national team upon Alejandro Sabella's call up to play the Superclásico de las Américas.
After working as Miguel Ángel Russo's assistant at Cerro Porteño, Boca Juniors and Al Nassr, Somoza was appointed manager of Rosario Central on 27 March 2022.