Staff Information Security Engineer

Five9

HybridPosted July 29, 2026

About the role

Five9 is a leading provider of cloud contact center software. We are seeking a Staff Information Security Engineer to join the Information Security team in Porto, Portugal. This role will own the operationalization and ongoing maturity of Five9's Cyber Resiliency program, including tooling to continuously identify, prioritize, and remediate infrastructure resilience issues across AWS, GCP, and Azure. You will be responsible for program governance, tool ownership, process development, and engineering engagement to scale the program, with secondary responsibilities to support the Cloud Security program as a senior technical resource.

Staff Information Security Engineer

Five9

HybridPosted July 29, 2026

About the role

Five9 is a leading provider of cloud contact center software. We are seeking a Staff Information Security Engineer to join the Information Security team in Porto, Portugal. This role will own the operationalization and ongoing maturity of Five9's Cyber Resiliency program, including tooling to continuously identify, prioritize, and remediate infrastructure resilience issues across AWS, GCP, and Azure. You will be responsible for program governance, tool ownership, process development, and engineering engagement to scale the program, with secondary responsibilities to support the Cloud Security program as a senior technical resource.

Key responsibilities: - Own the operational lifecycle of the Cyber Resiliency program, including tool administration, system and resource mapping, criticality tiering, and issue triage workflows. - Develop and maintain program governance: process documentation, SLAs for remediation, escalation paths, and quarterly review cadences. - Build executive reporting for security and engineering leadership: resilience score trends, remediation velocity, IaC coverage, and risk exposure by system criticality tier. - Drive the communication plan for the program, ensuring engineering teams understand expectations before receiving remediation tickets. - Define and maintain issue prioritization frameworks that balance system criticality, environment, severity, and remediation effort. - Partner with engineering leads to drive remediation of infrastructure resilience issues, removing blockers and tracking progress through Jira. - Cloud Security (supporting): Par

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Key responsibilities: - Own the operational lifecycle of the Cyber Resiliency program, including tool administration, system and resource mapping, criticality tiering, and issue triage workflows. - Develop and maintain program governance: process documentation, SLAs for remediation, escalation paths, and quarterly review cadences. - Build executive reporting for security and engineering leadership: resilience score trends, remediation velocity, IaC coverage, and risk exposure by system criticality tier. - Drive the communication plan for the program, ensuring engineering teams understand expectations before receiving remediation tickets. - Define and maintain issue prioritization frameworks that balance system criticality, environment, severity, and remediation effort. - Partner with engineering leads to drive remediation of infrastructure resilience issues, removing blockers and tracking progress through Jira. - Cloud Security (supporting): Par