Mellios joins the organization with over three decades of experience in the health plan sector. Before this appointment, he served as Senior Vice President of Sales at HealthEdge. His career history includes leadership roles at Optum, Change Healthcare, and Altegra Health, where he focused on payment integrity, risk, and quality strategies.

At SSI, Mellios will manage the firm's payer-facing portfolio as health plans face mounting pressure from regulatory updates and complex transaction requirements. He emphasizes that modernizing operations through claims automation and digital quality measurement is essential for long-term resilience. According to Mellios, the core of his work will involve tailoring data exchange strategies to meet the specific operational maturity of each client, balancing current needs with five-year growth objectives.