Mariana Cottier-Bucco, originally from Venezuela, came to the United States when she was six years old. It was then that she started to play the violin, under the instruction of Irina Schuck. At age 13 she enrolled in the studio of Lee Snyder at the Settlement Music School in Philadelphia, where she was accepted into their Advanced Studies program.
Cottier-Bucco participated in several concerto competitions in the Philadelphia area. She was the winner of the Newtown Square Chamber Orchestra, the Old York Orchestra, and the Philadelphia Sinfonia concerto competitions. Cottier-Bucco was also a 2010 Sphinx Competition Junior Division Semi-finalist and a 2011 Sphinx Competition Senior Division Semi-finalist.
Cottier-Bucco earned her Bachelor of Music at Indiana University Jacobs School of Music under the instruction of Alexander Kerr. Prior to joining the Dallas Symphony Orchestra full time in September 2015, she was a Dallas Symphony Orchestra/Jaap van Zweden Scholar.