Noun: Virtuoso (ver-choo-OH-so)
1. An experimenter or investigator especially in the arts and sciences.
2. One skilled in or having a taste for the fine arts.
3. One who excels in the technique of an art: especially a highly skilled musical performer.
Sample sentence: After years of lessons and practice, Megan is now a virtuoso on the cello, looking for work with a major symphony orchestra.