Posted in San Francisco Restaurants Hausmann Quartet cellist Alex Greenbaum is one of the busiest musicians … Leave a comment Hatmaker, a San Diego Symphony violinist, and Greenbaum have two sons, ages 5 and 7. “Yes, it’s often crazy,” said the cellist, who turns 40 in mid-April and moved to San Diego in 2012. https://www.sandiegouniontribune.com/entertainment/classical-music/story/2023-01-22/hausmann-quartet-cellist-alex-greenbaum-is-one-of-the-busiest-musicians-in-san-diego