Valencia completed his Bachelor of Music Degree in Viola Performance at the University of North Texas under the tutelage of Dr. Susan Dubois.

Recently, Nicolas was selected as a recipient of the 2023 Los Angeles Chamber Orchestra Fellowship, and received the inaugural viola position in the Thornton Virtuosi Chamber Ensemble. He has also been selected as a finalist for the Keston Max Fellowship at the London Symphony Orchestra, and is currently a substitute violist at the New World Symphony.

Nicolas has held principal viola positions with ensembles such as the Music Academy of the West, Thornton Symphony Orchestra, Thornton Opera Orchestra, University of North Texas Symphony Orchestra, UNT Opera Orchestra, the Fantasmi Ensemble, and the New Spain Baroque Orchestra.