Who WE are

Kirby Gilliam is a Board-Certified Music Therapist, organizational leader, and changemaker passionate about using connection as a catalyst for progress. As the founder of Plainsong Music Services—one of Indiana’s largest private music therapy practices—Kirby leads a team of over 20 professionals serving hundreds of clients each week across the state.

With a Master’s in Music Therapy and more than a decade of experience in clinical practice, supervision, and business development, Kirby has built a reputation for her ability to unite people around shared purpose. Her leadership style is defined by authenticity, strategic vision, and a genuine investment in people—qualities that have helped Plainsong grow from a solo practice into a statewide leader in the field.

Beyond her work in private practice, Kirby serves on multiple boards and advisory committees where she brings her expertise in program design, legislative advocacy, and organizational growth. As co-founder of the Music Therapy Access Coalition (MTAC), she works to ensure that providers and families have a voice in state-level decisions that shape the future of care access in Indiana.

Whether mentoring emerging leaders, building coalitions, or representing her field in policy discussions, Kirby’s approach centers on collaboration, integrity, and impact. She believes that lasting change happens when people feel seen, supported, and inspired to lead with purpose.

Allison Thomas is a Board-Certified Music Therapist and the founder of Mainstay Music Therapy, one of Indiana’s largest private practices, employing over 20 music therapists and serving clients across half the state. With more than 15 years of experience in clinical practice, business leadership, and consulting, Allison has built an organization recognized for its innovation, collaboration, and client-centered approach.

Holding a Master of Business Administration, she brings a rare and valuable perspective to the intersection of therapy, business operations, and policy—allowing her to see the broader systems at play and make strategic decisions that have helped Mainstay thrive and create lasting impact.

Beyond her work in private practice, Allison is dedicated to advancing the music therapy profession through Learn With Mainstay, offering continuing education and professional development opportunities that elevate the quality of care provided statewide. As co-founder of the Music Therapy Access Coalition (MTAC), she leads initiatives to ensure families and providers have a voice in state-level decisions that shape the future of music therapy access.

Her experience navigating complex funding systems, leading large teams, and designing sustainable service models uniquely positions her to guide statewide advocacy efforts. Grounded in her belief that strong systems and informed advocacy create stability for providers and better outcomes for clients, Allison continues to champion accessible, high-quality, and impactful music therapy for every Hoosier who needs it.