Mark Stagi is a Customer Success executive and operator with deep experience building, scaling, and transforming post-sales organizations in high-growth SaaS companies. He has helped leadership teams rethink Customer Success as a revenue-driving function—improving retention, expanding customer lifetime value, and building cultures obsessed with measurable outcomes. Over the course of his career, Mark has led global Customer Success teams at companies including AppZen, Base (acquired by Zendesk), Hightail, and Upwork. He is known for bringing sales rigor into CS, applying discovery, qualification, and coaching principles to drive stronger renewals, expansion, and executive alignment. In addition to his operating roles, Mark is an entrepreneur, advisor, and coach to CS leaders navigating growth, churn, and organizational change. He is passionate about developing talent, building global teams, and helping Customer Success leaders elevate their commercial mindset without losing customer trust. Outside of work, Mark is a marathon runner, lifelong tech nerd, and proud dad who believes growth, both personal and professional, comes from consistent discipline and a willingness to challenge the status quo.