Simón Echeverría Romero, also known as "Big Simon", (9 July 1972 – 31 July 2006) was a Chilean record producer best known for his work with Alejandro Sanz, Amaral, Celtas Cortos, Nacho Vega, Rosana, Joaquín Sabina, Mägo de Oz, Luis Cobos, Saratoga, Los Pecos, Sergio Dalma, Sôber, Stravaganzza, Skizoo, Dark Moor, WarCry, Ebony Ark, Coilbox, Dreamaker, Silver Fist, Miguel Bosé, Terroristars, Infernoise, FreakMind, etc.

These activities were parallel to his musical studies, and his job as network administrator and computer systems, and responsible for the area of graphics and design company in Madrid Aysav Sad.

His career began as a music producer in the former studies Sintonía Madrid where producers collaborated with national and international as well as with artists and groups like Alejandro Sanz, Amaral, Celtas Cortos, Nacho Vega, Rosana, Joaquín Sabina Mägo de Oz, Luis Cobos, Saratoga, Fish, Sergio Dalma Sôber Stravaganzza Skizoo Dark Moor WarCry, Ebony Ark, Coilbox, Dreamaker, Silver Fist, The Clash, Terroristars, Infernoise, FreakMind, and so on.

In recent years served as Free-Lance requested by hard rock and progressive bands, as well as sound technician for direct groups like Dover, Skizoo, Carmen Paris, and so on.

In March 2007 editing a double-disc tribute to Not For Us Urban Dux Terroristars, Stravaganzza Skunk City, Skizoo, Silver Fist, Savia, Melquiades, Mägo de Oz, Kaothic, Infernoise, Zulu Time, Ebony Ark, Dreamaker, Dark Moor, and Basic.