In 1993, she broke through internationally with her first feature documentary "Romance de Valentía" about the Spanish bullfighting, which was awarded at several European film festivals.

[2] Her film "Lagrimas Negras" (1997) about the Cuban old timers band Vieja Trova Santiaguera, won multiple awards, and anticipated Wim Wenders' Buena Vista Social Club, (1999).

Sonia's subsequent documentaries include "The Master and His Pupil" about the Russian conductor Valery Gergiev, and filmic portraits of the Dutch folk singer Frédérique Spigt, and Sonia's mother, artist Dora Dolz.

Sonia's work is distinguished several times among others with the Golden Calf Special Jury Prize in 1998; as the best documentary at the Golden Prague Festival 2003; as best documentary at the Bergen International Film Festival in 2004; and with the Pendrecht Culture Prize in 2007 in Rotterdam.

[3][4] Romance de Valentía, 1993 Lágrimas Negras, 1997 Yo soy así, 2000 Master and His Pupil, 2003