Rafael Delgado was a cellist with well-known youth orchestras both in Lima and Buenos Aire, with which he performed in important halls in Peru, Argentina, and Spain. -- Peru National Conservatory Orchestra, Argentina National Conservatory Orchestra, Libertador San Martín Youth Orchestra, and the School of Medicine Youth Orchestra, among others. He also played with the Municipal Theater Orchestra in Lima, and also with the Neuquén Province Orchestra. and the Olavarría City Hall Orchestra in Argentina. In 2004, he was invited by the companies Casa de la Opera de Buenos Aires and Opera Viva for cello solo execute at the Teatro Avenida. Since 2009 collaborates with the Orquesta Sinfónica Nacional, Orquesta Estable del Teatro Colón and Orquesta del Tango de Buenos Aires.

He also played first cello with several chamber orchestras – Scherzo String Orchestra, Crescendo String Orchestra (from Buenos Aires Collegium Musicum), Congress of the Nation Chamber Orchestra, Lanus University Orchestr, Tandil Chamber Orchestra. He was a member of Mayo Chamber Orchestra from 2002 to 2005, where he was a soloist throughout the 2003 season.