Director, IT Infrastructure

Join us in bringing joy to customer experience. Five9 is a leading provider of cloud contact center software, bringing the power of cloud innovation to customers worldwide. Living our values everyday results in our team-first culture and enables us to innovate, grow, and thrive while enjoying the journey together.

We celebrate diversity and foster an inclusive environment, empowering our employees to be their authentic selves. We are looking for a Director of IT Infrastructure Operations, who will be the leader accountable for the global infrastructure and operational backbone of Five9’s internal IT — spanning networking, identity and access management, IT services, cloud services, and the Microsoft 365 platform. This is a strategic leadership role, not a hands-on engineering role.

The leader in this seat sets the multi-year roadmap, builds and develops the team that executes it, runs a metrics-driven operation, and partners closely with Security, Engineering, Workplace, and business leaders to ensure Five9 employees have a secure, productive, and reliable computing environment wherever they work. The successful candidate will bring a rare combination of strategic vision, operational rigor, and people leadership. They will be equally comfortable in a Chief Information Officer (CIO) staff conversation about a three-year platform strategy and in a war-room incident review where minutes matter.

They lead with data, drive through process, and develop talent.

Key Responsibilities

Strategy Leadership • Own and execute the multi-year strategy and roadmap for global IT infrastructure and operations, aligned to Five9’s business priorities and growth plans. • Serve as a key member of the CIO’s leadership team; contribute to enterprise IT strategy, budget planning, and organizational design. • Build, develop, and retain a high-performing global team of IT leaders, managers, engineers, and administrators across multiple geographies.

• Establish a culture of operational excellence, accountability, continuous improvement, and customer service to internal stakeholders. • Partner with the CISO and Security leadership to ensure infrastructure design, identity controls, and operational practices meet Five9’s security and compliance obligations. Networking (Global) • Own the global enterprise network strategy: corporate LAN/WLAN, SD-WAN, remote access (ZTNA/VPN), DNS, and internet egress across all Five9 offices and remote workers.

• Ensure network availability, performance, and observability meet defined SLAs across all regions. • Drive modernization initiatives — zero trust networking, secure access service edge (SASE), network automation — with clear business cases and measurable outcomes. • Manage relationships with network carriers, ISPs, and connectivity partners globally.

Identity Access Management • Own the enterprise IAM strategy and platform: single sign-on, multi-factor authentication, lifecycle management, privileged access management, and entitlement governance. • Partner with HR, Security, and application owners to ensure consistent identity governance across SaaS, infrastructure, and internal applications. • Lead modernization toward continuous access evaluation in alignment with zero trust principles.

Cloud Services • Own the strategy and operations for corporate IT cloud services. • Drive cloud FinOps discipline: cost visibility, optimization, and forecast accuracy. • Establish cloud governance, security guardrails, and lifecycle management.

• Partner with Security and Engineering on shared platforms, identity federation, and secure connectivity between corporate IT and product environments. Microsoft 365 • Own the Microsoft 365 platform end-to-end: Exchange Online, Teams, SharePoint, OneDrive, Intune, Entra ID, Purview, and the broader M365 ecosystem. • Manage licensing strategy, true-ups, and Microsoft Enterprise Agreement relationship in partnership with Procurement.