Question: Who is the Mexican-American bassist that plays for the band Big Sir?

Context paragraphs:
Big Sir (album): Big Sir is the first album by Big Sir, which is composed of bassist Juan Alderete and vocalist Lisa Papineau.

Cedric Bixler-Zavala: Cedric Bixler-Zavala (born November 4, 1974 in Redwood City, California) is a Grammy Award-winning American musician known for his work as frontman and lyricist of the progressive rock band The Mars Volta, and as frontman and occasional guitarist of the post-hardcore group At the Drive-In.  Currently he is a singer in the band Antemasque, and also sings and plays guitar in his band Zavalaz.  He has also played drums for a number of acts, including the dub act De Facto and more recently Big Sir and Anywhere.

Cizaña de los Amores: Cizaña de los Amores is the seventeenth studio album by Omar Rodríguez-López as a solo artist.  It was released on October 18, 2010 on CD and vinyl by Rodriguez Lopez Productions on Koncurrent in Europe, then November 18 through the US hello merchandise store.  It is the first collaboration between Omar and vocalist Lisa Papineau, who had previously worked with The Mars Volta bandmate Juan Alderete in their band Big Sir.  This record features the song "Victimas del Cielo" in studio form, having first been released on the live album "Los Sueños de un Hígado".

Juan Alderete: Juan Alderete de la Peña (born September 5, 1963) is a Mexican-American musician, best known as the longtime bassist of Racer X and The Mars Volta.

Big Sir (band): Big Sir is a band that includes the bass guitarist Juan Alderete (The Mars Volta and Racer X) and the singer Lisa Papineau.

Und Die Scheiße Ändert Sich Immer: Und Die Scheiße Ändert Sich Immer (German for "And the Shit Is Always Changing") is the second album by Big Sir, which includes The Mars Volta bassist, Juan Alderete, and Lisa Papineau of Air and M83.

Abraham Laboriel: Abraham Laboriel Sr. (born July 17, 1947) is a Mexican-American bassist who has played on over 4,000 recordings and soundtracks. " Guitar Player" magazine called him "the most widely used session bassist of our time".  Laboriel is the father of drummer Abe Laboriel Jr. and of producer, songwriter, and film composer Mateo Laboriel.  He is ranked No. 42 on "Bass Player" magazine's list of "The 100 Greatest Bass Players of All Time".

Now That's What I Call Big Sir: Now That's What I Call Big Sir is a remix album by Big Sir.  It consists of various remixes of songs from their first self-titled album.

Lisa Papineau: Lisa Papineau is a songwriter from New England who now resides in Paris, France.  She is the songwriter and vocalist for Los Angeles band Big Sir, who have released three albums.  Papineau has also loaned her vocals to other bands, including Air, M83, Anubian Lights, Farflung, P.O.D., and Crooked Cowboy and the Freshwater Indians, and recently collaborated with Japanese composer Jun Miyake on his album "Stolen From Strangers".

Before Gardens After Gardens: Before Gardens After Gardens is the third album by Big Sir.  The album features contributions by The Mars Volta’s Cedric Bixler-Zavala and Deantoni Parks, Rx Bandits’ Matt Embree and Steve Choi, bassist Jonathan Hischke and Beastie Boys producer Money Mark.

Supporting paragraphs: Big Sir (band) Juan Alderete
Answer: Juan Alderete