Molina has been affiliated with the Tucson Girls Chorus since 2006, first serving as artistic director and taking the helm as executive director in 2011. Under Molina’s guidance, the Tucson Girls Chorus has grown significantly in both programming and outreach. With her leadership, the TGC has transformed into a collaborative organization that creates access to inclusive programming for youth, and provides resources to music educators and support to their classroom all year-round.
In 2011, she was an honoree in Tucson's 40 under 40 for her significant achievements and contributions in her profession and community. In 2014, Molina was one of eight in the state of Arizona chosen as a Cox Hispanic Heritage Month honoree and in 2016 she was selected as finalist for the Woman of Influence Awards in the category Arts and Culture Champion.
In 2017, under Molina’s leadership, the Tucson Girls Chorus was awarded the 2017 Copper Cactus award for Non-Charitable Business sponsored by the Tucson Metro Chamber.
Born in Bogotá, Colombia, Marcela Molina holds degrees from Westminster Choir College and the University of Arizona. She has contributed articles to Antiphon, the official online publication of the Arizona American Choral Directors Association (AzACDA) and the book Teaching through Performance in Choir, Volume 2. She was named 2019 Choral Director of the Year by AzACDA and often serves as a clinician and guest conductor at choral festivals. Dr. Molina serves on the board of the Arizona American Choral Directors Association and serves as part of the advisory group to the Choral Commons.