Rubén V. Alliaud was born in Buenos Aires, Argentina, on January 8, 1966. He married Fabiana Bennett in 1992. They are the parents of six children.
He received a juris doctor degree from the University of Belgrano in 1993. He then began his career in the national civil courts under the dependence of the Supreme Court of Justice. He later specialized in criminal law. In 1996 he was designated professor at the University of Belgrano Law School.
In 1998 Rubén V. Alliaud started working as an attorney and a managing partner for Alliaud & Asociados. During his career, he joined the board of several companies.
At the time of his call, Elder Rubén V. Alliaud had been serving as an institute teacher, first counselor in the Argentina Missionary Training Center presidency, and public affairs director.
He has served in a number of Church callings, including full-time missionary in the Uruguay Montevideo Mission, elders quorum president, counselor in a stake mission presidency, young single adult adviser, counselor in a bishopric, high councilor, bishop, counselor in a stake presidency, stake president, Area Seventy in the South America South Area, and president of the Argentina Córdoba Mission.