The phrase "expertly conducted" is correct and usable in written English.
You can use it to describe something that was done with a high degree of skill, accuracy, or experience. For example: The symphony was expertly conducted by the orchestra's renowned maestro.
Diverse works by Copland, Bernstein, Barber and Schuman received sensitive and accomplished performances, expertly conducted by Jeffrey Milarsky.
Success of novel therapies will require the correct application of comprehensive preclinical studies with well-designed and expertly conducted human clinical trials.
Though expertly conducted by Kent Nagano and well sung by the cast (particularly James Maddalena and Sanford Sylvan, Mr. Adamss's music has a seriously limited range.
The Axiom players, current Juilliard students and recent graduates, gave an assured, glittering and rhapsodic performance, expertly conducted by Jeffrey Milarsky.
Widmann proved an exemplary soloist, while the piece itself felt in no way overshadowed by the expertly conducted complete performance of Ravel's Daphnis and Chloé that followed.
Still, the concert on Friday night, the second of three this season, expertly conducted by the orchestra's music director, George Manahan (best known as the music director of New York City Opera), offered an exhilarating program, with an Ives classic and four premieres.
The questionnaires are usually conducted expertly by Gaby Dunn, who is also involved in her own very excellent interview project called 100 Interviews.
The trombonists stood in rows along the spiral; the composer Neely Bruce conducted expertly from the lower part of the ramp, and the audience gathered on the floor below.
Researchers found that brain activity didn't double, but rather it decreased, so each task was completed less efficiently and less expertly than when being conducted separately.
The Qatar players, conducted by Mr. Maazel, expertly negotiated the work's tangy harmonies and perky rhythms.
Members of the Argento Chamber Ensemble, seated in a concert configuration on the stage and conducted by Michel Galante, expertly shrieked and shuddered in tones of agitation and enervation while metallic groans and childlike coos encircled the audience.
