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Petros
Perselis
SVP Global Customer Success
Hack The Box
Petros Perselis is the SVP of Global Customer Success at Hack The Box, the fastest-growing hacking playground and cybersecurity community in the world. His team provides best practices and value-add services to over 800 enterprise, university and government customers, and also owns retention and expansion metrics. Prior to HTB, Petros was the VP of Global Customer Success at Cutover, a SaaS leader in human and machine orchestration, while he also held senior GTM roles at SAP Qualtrics and Medallia in their pre-IPO days. At SAP Qualtrics he set up the New York office and established the company's presence in the US Northeast region; at Medallia, Petros was instrumental in growing the teams in London and New York and worked with some of the largest clients in complex software transformation programs. Petros earned a MSc in Management Science from Stanford University and a BSc in Electrical Engineering from Brown University. He is based in NYC and enjoys playing soccer, and traveling.
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11 March 2026 13:30 - 14:15
Panel | CS as the secret sales department: Mastering expansion without the hard sell
In a market where customer relationships define long-term success, Customer Success (CS) teams are uniquely positioned to drive sustainable revenue growth—without resorting to traditional sales pressure. This panel explores how CS can function as the “secret sales department,” mastering expansion through trust, timing, and value realization. Leaders from across the industry will discuss practical strategies, organizational models, and mindset shifts that empower CS teams to influence revenue while keeping customer advocacy at the core. Session will cover: - Expansions: Identifying value gaps and turning customer outcomes into natural growth opportunities - Renewals: Building proactive engagement frameworks that reduce risk and strengthen long-term partnerships - Upsells: Positioning enhanced capabilities as solutions to evolving customer needs - Cross-sells: Leveraging product ecosystem knowledge to introduce adjacent offerings that deepen account value This session is ideal for CS practitioners, revenue leaders, and anyone looking to align customer success with commercial impact - without the hard sell.