Curtiss's career underscores a steadfast dedication to enhancing addiction treatment services. Notably, his pivotal role in designing The Retreat model—a non-clinical, mutual-help approach grounded in the spiritual principles of AA—exemplifies his visionary leadership and transformative impact within the field. Prior to his tenure at The Retreat, Curtiss served in various capacities at the Hazelden Betty Ford Foundation, accruing over 19 years of experience in leadership positions across the organization.