Roser Palomero completed her musical studies in Lleida and at the Municipal Conservatory of Music in Barcelona, obtaining advanced degrees in accordion, piano, and Music Theory and Solfege.
1st Prize at the Accordion European Championship, Paris 1976.
For winning this competition, as well as for her foundation and direction of the Cervera Accordion Orchestra and the successes of her students in European competitions, she was awarded the title of «Lleidatana of the Month of November.»
In 1979, she organized the «National Accordion Competition» in the city of Lleida.
She is an active member of various juries, including the Queen Sofia Competition in Madrid.
In 1983, she settled in Andorra and founded the Harmonia School of Music in Escaldes-Engordany, which maintains a busy activity to this day. In 1984, she created the Harmonia Accordion Orchestra, with which she won the European Cup in the «Orchestrates» category in 1995 and recorded 4 CDs.
She composed the sardana «Escaldes ja ets tota una pubilla» in commemoration of the 18th anniversary of the proclamation of Escaldes-Engordany as an independent parish.
In 1987 and 1997, she organized the Accordion World Trophy in the Principality.
Since 1994, she has organized the International Piano Competition, Premi Principat d’Andorra. In 2001 and 2003, she organized the International Accordion Competition, Gran Premi d’Escaldes-Engordany.
Since 1999, she has organized the International Music Course Principat d’Andorra.
In 1998, she became part of the «Fisorchestra Città di Osimo,» performing throughout Italy and participating, on September 4, 2004, in a concert at the youth festival dedicated to and in honor of Pope John Paul II organized by R.A.I. in the city of Loreto, Italy. In 2004, they performed together with the RAI Symphony Orchestra.
In the same year, she conducted the Harmonia Orchestra on behalf of the Andorran Government to celebrate the Diada d’Andorra in Toulouse. Also in 2004, she performed on the occasion of the UNESCO agreement declaring the Madriu Valley as a Cultural Heritage of Humanity.
In 1999, she participated in a teaching exchange, giving accordion classes at the Prague Conservatory.
Currently, she continues her work at the helm of the Harmonia School of Music in the Principality of Andorra and is the founder and president of the «Gran Premi de Música Lauredià.»