🛡️ Certified Examination Rigor: Jeannie Grassi holds the Registered Piano Technician (RPT) credential from the Piano Technicians Guild. To attain this credential, the practitioner completed and passed standardized written theory, aural concert tuning, and practical grand/vertical action regulation examinations.
RPT serving Bainbridge Island and North Kitsap Peninsula. Island marine climate specialist providing certified Dampp-Chaser humidity control, tuning, and regulation.
Seattle Piano Technicians Guild Directory (seattleptg.org). Record audited October 2026.