The orchestra is primarily composed of volunteers, though the organization's website also makes mention of being partially "semi-professional" in nature.
From the orchestra's description page: The Baltimore Philharmonia Orchestra, Inc. is a not-for-profit community-based volunteer and semi-professional orchestra of accomplished musicians that incorporates performers of all ages to play the masterworks of the symphonic repertoire encouraging the love of classical music and providing a series of regular concerts to the community at no cost.
[1] Founded in 1998 as an offshoot of the Gettysburg Symphony, the group has performed within the city and outside of Baltimore.
[3] While BSO musicians or substitutes are sometimes paid to fill out tough-to-fill positions, the Philharmonia's players are more likely to come from academic groups or other volunteer orchestras, such as the Prince George's Philharmonic, Hunt Valley Symphony, Hopkins Symphony Orchestra, Columbia Orchestra or Gettysburg Symphony.
This article about a United States classical music orchestra is a stub.