The PSO has undertaken several highly successful collaborations with other local arts organizations.  In 2017, the PSO partnered with The Reston Chorale to perform Beethoven's Ninth Symphony at the Hylton Performing Arts Center in Manassas. The performance also included the American University Chorus and soloists from the Maryland Lyric Opera.  Over 200 musicians on stage performed the soaring epic Ninth Symphony to a sold-out audience.