Counter Invasion: Management firm Invasion Group has expanded into Nashville, adding to the company's established offices in New York and Boston. Heading the new Music City shop is management veteran Courtney Oertel, most recently of Oertel Artist Management. Invasion clients include Rissi Palmer and Zac Brown Band's John Driskell Hopkins. Oertel also previously served as VP/Creative Strategy & Brand Alignment for Hopkins' foundation, Hop On A Cure. Reach her here.