[1] As part of Andain, Mavie has written songs in partnership with Josh Gabriel since 2001, better known for their early singles "Summer Calling" (2002) and "Beautiful Things" (2003),[2] and the 2012 debut album You Once Told Me.

She has also performed on stage in musicals, including Pirates of Penzance, West Side Story, and The Best Little Whorehouse in Texas.

After moving to the Bay Area, Marcos met a budding electronic music producer named Josh Gabriel.

[5] Mavie Marcos's educational and vocational pursuits have included science, health, and entrepreneurship in addition to music.

[6] In 2004, Marcos founded Intuitive Fitness and for approximately four years helped clients with weight training and calorie-burning programs.