For the 2008–09 campaign, Sarmiento was loaned to Xerez CD of Segunda División,[3] first appearing officially in a 1–1 home draw against Real Murcia on 3 September 2008 in the second round of the Copa del Rey.[4] Although not an undisputed starter, he did feature significantly[5] as the Andalusians achieved a first-ever top flight promotion, earning the nickname Currito de Jerez by their fans in the process.[6]
On 31 August 2009, Sarmiento went on another season-long loan, yet in the second level, now with Girona FC.[7] He made his first appearance on 3 October in a 2–2 draw with SD Huesca, scoring his team's second goal,[8] but was released by the Catalans in late January 2010 for disciplinary issues,[9] subsequently training with former club Santander to stay fit.[10]
Sarmiento spent 2010–11 with UD Salamanca, again on loan and in the Spanish second tier.[11] He netted for the first time in the league on 15 January 2011, but in 2–3 home loss to FC Barcelona B.[12] On 1 March he scored the game's only goal at home against Villarreal CF B, helping the Castile and León side to their first win in three months.[13]
On 21 January 2015, Sarmiento joined Peruvian Primera División's Real Garcilaso.[15] During his one-year spell in Cusco, he played 39 matches across all competitions and scored eight times;[16] additionally, he bought a bar in the city.[17]
Back in Argentina, Sarmiento played for Club Atlético Banfield[18] and Newell's Old Boys. During his stint at the latter club, marred by injuries, he was often more talked about for his behaviour off the pitch.[19][20][21]
In June 2019, Sarmiento signed for Greek club Volos FC.[22] In September, after only eight minutes of action in the Super League, his contract was terminated by mutual consent,[23] and he returned to All Boys shortly after on a one-and-a-half-year deal.[24]
^Miró, Jorge (1 September 2008). "Sarmiento, ilusión y ganas para el Xerez" [Sarmiento, enthusiasm and desire for Xerez]. Diario de Jerez (in Spanish). Retrieved 28 December 2013.
^Fernández, B. (14 July 2010). "Sarmiento, cedido al Salamanca" [Sarmiento, loaned to Salamanca] (in Spanish). La Voz Digital. Retrieved 28 December 2013.
