Senior Cyber Defense Engineer - SIEM, SOAR & OT Security

GCS; Windsor; Presencial; GBP 90.000 - 125.000; Jornada completa

Descripción de la vacante

GCS in Windsor is seeking a highly capable Senior Cyber Security Engineer to lead the design, implementation, operation, and continuous improvement of enterprise security across IT and OT environments. This hands-on role builds and maintains controls that enable early threat detection, rapid response, and measurable risk reduction.

The successful candidate will own BAU operations, drive automation, and collaborate with technology, OT, cloud, and security teams to ensure controls are effective,

Formación

• Proven experience in Security Engineering within a large enterprise.
• Strong background in Detection & Response Engineering and Security Operations.
• Experience designing, implementing, and supporting SIEM, SOAR, EDR, Email Security, and Identity Security platforms.
• Practical experience with cloud security, infrastructure security, network security, and endpoint security technologies.
• Knowledge of enterprise identity and privileged access management solutions, such as Entra ID and CyberArk.
• Experience identifying, mitigating, and managing cyber risks within complex digital environments.
• Understanding of both IT and OT environments.
• Ability to automate security processes using scripting, orchestration, or workflow technologies.
• Strong analytical, troubleshooting, and problem-solving skills.
• Excellent communication across technical and business teams.
• Experience in regulated industries and critical infrastructure environments.
• Mentoring junior engineers and leading security initiatives.
• Familiarity with ISO 27001, NIS, IEC 62443, CIS Controls, or NIST.

Responsabilidades

• Design, implement, configure, and maintain security controls across IT and OT environments.
• Engineer and improve detection and response capabilities through SIEM, EDR, SOAR, email security, identity, and infrastructure platforms.
• Develop and maintain high-quality detection use cases, alerting, enrichment processes, and automated response workflows.
• Own security technologies post-implementation, ensuring ongoing support and optimization.
• Ensure new security capabilities transition into BAU with proper processes and monitoring.
• Participate in a 24x7 on-call support rota.
• Monitor effectiveness of controls and identify opportunities to improve visibility and risk reduction.
• Leverage incidents, audits, threat intel, and risk assessments to enhance security capabilities.
• Drive automation to improve operational efficiency and reporting accuracy.
• Define and maintain operational procedures, standards, and engineering documentation.
• Collaborate with IT, OT, cloud, and security teams to maintain standards.
• Communicate risks and remediation activities to technical and non-technical stakeholders.
• Support audits, compliance reviews, and security assessments.
• Align designs with industry standards and regulatory requirements.

Conocimientos

Security engineering

Detection & response

Automation scripting

Educación

Bachelor's degree in Cyber Security / related field

Herramientas

SIEM

EDR

SOAR

Email Security

Identity Security

Entra ID

CyberArk

Descripción del empleo

GCS in Windsor is seeking a highly capable Senior Cyber Security Engineer to lead the design, implementation, operation, and continuous improvement of enterprise security across IT and OT environments. This hands-on role builds and maintains controls that enable early threat detection, rapid response, and measurable risk reduction.

The successful candidate will own BAU operations, drive automation, and collaborate with technology, OT, cloud, and security teams to ensure controls are effective,