Sandy Grassmuck

Sandy Grassmuck is the visionary founder of The Sound Sanctuary, a space devoted to peace, restoration, and soul alignment. A second-generation entrepreneur, Sandy built a thriving real estate brokerage and earned a reputation for leadership and success in the fast-paced world of business.

Yet even at the height of her achievements, she felt something was missing. After personally experiencing the stress, burnout, and emotional toll of constant striving, Sandy discovered the profound healing power of sound therapy. What began as a personal journey of renewal quickly blossomed into a calling to help others reconnect with themselves and rediscover their inner calm.

From that transformation, The Sound Sanctuary was born—a place where science meets spirit, and where success is redefined by serenity, purpose, and wholeness. Sandy now guides others to reclaim their light through sound journeys, energy work, and soulful programs that activate deep healing from within.

Today, Sandy continues to lead a successful real estate company while running The Sound Sanctuary—proof that with healing, balance, and the right team, it truly is possible to live the best of both worlds.

Outside of work, Sandy is married to her teenage sweetheart—it was love at first sight. Together, they share one amazing son, his beautiful family, and two incredible grandchildren. They divide their time between Lake St. Louis and Branson, and love spending their free moments traveling and relaxing by the water.