The biggest appreciation so far of Marialy Pacheco’s qualities has been the winning of the Montreux Solo Piano Competition 2012. She is the first woman to win this prize in 15 years history of the competition. In the explanation of the decision Jury president Leszek Mozdzer said: “Deciding between the three contenders was tough. In the end, the contestants’ joy in performing and her authenticity guided our decision making.”

In 2014, Marialy was announced as first female jazz pianist worldwide to be an official "Bösendorfer Artist“.
Marialy Pacheco performed at national and international festivals like Aalener Jazzfest, Enter Music Festival (Poland), St. Moritz Art Masters (Switzerland),Rheingau-Musik-Festival, ZMF Freiburg, Jazzfestival Oloron (France) Audi Jazzfestival, Ingolstädter Jazztage, Piano City Milano, Havana Jazzfestival and at Beethovenfestival Bonn.

In April 2017 Marialy released the album "DUETS" – quite an intimate and many-faceted album to which Marialy has invited her favourite musicians and friends like Hamilton de Holanda, Omar Sosa, Joo Kraus, Rhani Krija, Miguel Zenon and Max Mutzke.