McGarvey studied voice at Manhattan School of Music and was later a theatre major in college. She pursued an acting career but later moved into a magazine and digital media career. During that time, she sold advertising and managed sales teams for companies like Conde Nast, WebMD and worked for brands including GQ, Travel + Leisure, and Allure. In between, she took a year off and backpacked alone around the world. Later, after having two children, she left media and became an executive recruiter for internet companies. In 2017, she began writing full time and has since published six novels.