Senior Information Security Engineer is sought to join Five9's Security Risk Management team in Porto, Portugal. The role supports the day-to-day execution of risk identification, assessment, treatment, and reporting across Five9's production infrastructure, cloud services, corporate systems, and acquired platforms, collaborating with engineering, operations, and business stakeholders to surface security risks, drive remediation, and maintain a clear risk posture for leadership. Responsibilities include identifying, documenting, and assessing security risks across production infrastructure, cloud services, corporate systems, and acquired platforms; maintaining the Security Risk Register in Jira, ensuring risks are categorized, assigned to owners, and tracked through their lifecycle; engaging with service owners, engineering leads, and operations teams to establish risk ownership and drive remediation or mitigation plans; facilitating the risk acceptance process, including preparing risk acceptance documentation and coordinating approvals with stakeholders; developing and delivering risk reporting for security leadership with dashboards and metrics; collaborating with compliance, vulnerability management, and other Information Security functions to ensure risk findings are incorporated into the broader security program; researching and applying risk management frameworks and methodologies to improve program maturity; contributing to the development of risk management policies, procedures, and playbooks. Requirements: 3+ years of information security experience, with at least

Senior Information Security Engineer is sought to join Five9's Security Risk Management team in Porto, Portugal. The role supports the day-to-day execution of risk identification, assessment, treatment, and reporting across Five9's production infrastructure, cloud services, corporate systems, and acquired platforms, collaborating with engineering, operations, and business stakeholders to surface security risks, drive remediation, and maintain a clear risk posture for leadership. Responsibilities include identifying, documenting, and assessing security risks across production infrastructure, cloud services, corporate systems, and acquired platforms; maintaining the Security Risk Register in Jira, ensuring risks are categorized, assigned to owners, and tracked through their lifecycle; engaging with service owners, engineering leads, and operations teams to establish risk ownership and drive remediation or mitigation plans; facilitating the risk acceptance process, including preparing risk acceptance documentation and coordinating approvals with stakeholders; developing and delivering risk reporting for security leadership with dashboards and metrics; collaborating with compliance, vulnerability management, and other Information Security functions to ensure risk findings are incorporated into the broader security program; researching and applying risk management frameworks and methodologies to improve program maturity; contributing to the development of risk management policies, procedures, and playbooks. Requirements: 3+ years of information security experience, with at least