Arismendi graduated from UNIACC University in 2000 with a degree acting. Until 2001, he worked as a host, panelist, and reporter for the Chilevisión youth program Extra Jóvenes.
In 2002, he was part of the team for the Chilean version of Caiga Quien Caiga (CQC), until 2004, when he joined the program Pollo en Conserva on La Red –hosted by Juan Carlos Valdivia–.
From 2005 to 2009, Arismendi served as host of Wipeout, Hombre al Agua, and as a panelist and reporter for Pasiones, on Televisión Nacional de Chile (TVN).[4]
In 2010, he returned to Chilevisión (CHV). There he hosted the programs Siete Días, Gente como tú, and the morning show, La mañana de Chilevisión. From 2016 to 2018, he hosted the CHV program Espías del amor, the Chilean version of Catfish: The TV Show.