IT Security Officer

Make an impact with NTT DATA Join a company that is pushing the boundaries of what is possible. We are renowned for our technical excellence and leading innovations, and for making a difference to our clients and society. Our workplace embraces diversity and inclusion – it’s a place where you can grow, belong and thrive. Your day at NTT DATA The IT Security Officer will support the customer's information security program across a hybrid infrastructure consisting of on-premises systems and AWS cloud services. This role is responsible for driving the vulnerability management lifecycle, maintaining the organizational Risk Register, coordinating risk acceptance and remediation activities with stakeholders, and overseeing day-to-day security operations related to signature updates and vendor vulnerability notifications. Key Responsibilities Vulnerability Management • Execute and manage regular vulnerability scans across on-premises infrastructure and AWS services (EC2, S3, RDS, and other relevant services) • Generate, review, and distribute vulnerability scan reports to relevant technical teams and leadership • Follow up with Subject Matter Experts (SMEs) on outstanding vulnerability findings to ensure timely remediation or documented exceptions • Track remediation status and escalate overdue items per defined SLAs Risk Register & Risk Acceptance • Own and maintain the organization's Risk Register, ensuring it reflects current, accurate risk data • Draft Risk Acceptance forms for identified risks that cannot be immediately remediated • Coordinate with business and technical stakeholders to review, negotiate, and obtain formal approval/sign-off on risk acceptances • Periodically review accepted risks for continued validity and reassessment Security Operations Oversight • Monitor and verify that security signature updates (AV/EDR, IDS/IPS, etc.) are applied consistently across the environment • Review vendor security bulletins and vulnerability notifications to determine applicability to the customer's environment • Ensure timely triage and action on vendor-disclosed vulnerabilities affecting in-scope systems Impact & Risk Analysis • Perform impact analysis on identified vulnerabilities using CVSS (Common Vulnerability Scoring System) scores • Contextualize CVSS base scores against the actual environment (asset criticality, exposure, compensating controls) to determine real-world risk and prioritization • Provide risk-based recommendations to stakeholders to support remediation prioritization decisions Reporting & Communication • Prepare periodic status reports/dashboards on vulnerability management, risk register status, and outstanding risk acceptances for leadership review • Communicate effectively with technical SMEs, business stakeholders, and management across varying levels of technical understanding Vulnerability Management • Execute and manage regular vulnerability scans across on-premises infrastructure and AWS services (EC2, S3, RDS, and other relevant services) • Generate, review, and distribute vulnerability scan reports to relevant technical teams and leadership • Follow up with Subject Matter Experts (SMEs) on outstanding vulnerability findings to ensure timely remediation or documented exceptions • Track remediation status and escalate overdue items per defined SLAs Risk Register & Risk Acceptance • Own and maintain the organization's Risk Register, ensuring it reflects current, accurate risk data • Draft Risk Acceptance forms for identified risks that cannot be immediately remediated • Coordinate with business and technical stakeholders to review, negotiate, and obtain formal approval/sign-off on risk acceptances • Periodically review accepted risks for continued validity and reassessment Security Operations Oversight • Monitor and verify that security signature updates (AV/EDR, IDS/IPS, etc.) are applied consistently across the environment • Review vendor security bulletins and vulnerability notifications to determine applicability to the customer's environment • Ensure timely triage and action on vendor-disclosed vulnerabilities affecting in-scope systems Impact & Risk Analysis • Perform impact analysis on identified vulnerabilities using CVSS (Common Vulnerability Scoring System) scores • Contextualize CVSS base scores against the actual environment (asset criticality, exposure, compensating controls) to determine real-world risk and prioritization • Provide risk-based recommendations to stakeholders to support remediation prioritization decisions Reporting & Communication • Prepare periodic status reports/dashboards on vulnerability management, risk register status, and outstanding risk acceptances for leadership review • Communicate effectively with technical SMEs, business stakeholders, and management across varying levels of technical understanding Required Qualifications • Bachelor's degree in information security, Computer Science, or related field (or equivalent work experience) • 3–5+ years of experience in IT security operations, vulnerability management, or risk management • Hands-on experience with vulnerability scanning tools (e.g., Tenable/Nessus, Qualys, Rapid7) • Working knowledge of AWS security services and shared responsibility model (e.g., Security Hub, GuardDuty, Inspector, IAM) • Solid understanding of on-premises infrastructure security (servers, network devices, endpoints) • Strong understanding of CVSS scoring methodology and practical risk-based prioritization • Experience developing and managing Risk Registers and Risk Acceptance documentation • Excellent stakeholder management and communication skills, with ability to work cross-functionally Preferred Qualifications • Relevant certifications: Security+, CySA+, CISSP, CRISC, AWS Security Specialty, or similar • Experience with GRC tools (e.g., ServiceNow GRC, Archer) • Familiarity with frameworks such as NIST 800-53, NIST CSF, or ISO 27001 •…