Cyber Security Engineer SME

Proactive Appointments; City Of London; On-site; GBP 70,000 - 100,000; Full time

Job summary

Proactive Appointments in the United Kingdom seeks an experienced Cyber Security Engineer SME to own operational management, engineering and lifecycle maintenance of enterprise security tools. You will work across London and India teams to strengthen controls and drive continuous improvement.

Ideal candidates have hands-on security tooling expertise, strong Windows/Linux infrastructure knowledge and a track record of delivering secure, reliable platforms in large environments.

Qualifications

• 8+ years' experience in cyber security or information security.
• Proven experience managing multiple security platforms in complex enterprise environments.
• Strong technical understanding of Windows Server, Linux, infrastructure.

Responsibilities

• Cyber Security Tooling: Manage day-to-day operation, maintenance, configuration and lifecycle of enterprise security platforms.
• Red Team & Forensics: Support red team tools, digital forensics, EDR platforms and threat monitoring.
• Platform Engineering: Deploy, patch, upgrade and maintain security tools; roll out new features.
• Operational Support: Troubleshoot issues, identify root causes, minimize reliance on infra teams.
• Infrastructure & Integration: Understand interactions with AD, DNS, GP, servers and networks.
• Security Controls: Maintain firewalls, access controls, MFA and email security policies.
• Analysis & Monitoring: Assist log analysis, threat monitoring and incident investigations.
• Tool Implementation: Evaluate, deploy and integrate new cyber security technologies.
• Risk & Assurance: Support vulnerability management, audits and compliance.
• Continuous Improvement: Improve tooling performance, reduce incidents, enhance detection.
• Stakeholder Management: Document technical handovers with teams, vendors and audits.

Skills

Cyber security

Incident response

Threat monitoring

EDR tooling

Windows Server

Education

Bachelor's degree in CS/IS

Tools

Windows Server

Linux

Active Directory

Firewalls

DNS

Job description

Cyber Security Engineer SME

Inside IR35 - 4 days a week

We are looking for an experienced Cyber Security Engineer SME to join a growing cyber security team, taking ownership of the operational management, engineering and lifecycle maintenance of a broad range of enterprise security tools.

This is a hands-on engineering role suited to someone with strong cyber security expertise and a solid understanding of IT infrastructure, Windows Server, Linux and networking. You will be responsible for ensuring existing security platforms remain secure, available and effective, while supporting the implementation and integration of new tools and capabilities.

Working closely with cyber security colleagues in London and India, as well as wider technology and engineering teams, you will help strengthen security controls, improve operational resilience and support the ongoing evolution of the organisation's cyber security capabilities.

Key Responsibilities

• Cyber Security Tooling: Manage the day-to-day operation, maintenance, configuration and lifecycle management of multiple enterprise cyber security platforms.

• Red Team & Forensics: Support the operation and maintenance of red team tools, digital forensic solutions, EDR platforms, threat monitoring capabilities and decoy systems.

• Platform Engineering: Deploy, configure, patch, upgrade and maintain security tools, including rolling out new features and ensuring platforms remain reliable and fit for purpose.

• Operational Support: Investigate and troubleshoot platform issues independently, identifying root causes and resolving problems without unnecessary reliance on infrastructure teams.

• Infrastructure & Integration: Understand how security tools interact with servers, operating systems, networks, Active Directory, DNS, Group Policy and other connected systems.

• Security Controls: Support the configuration and maintenance of security controls, including firewalls, access controls, multi-factor authentication and email security policies.

• Analysis & Monitoring: Assist with log analysis, threat monitoring, security incident investigation and the identification of vulnerabilities or control weaknesses.

• Tool Implementation: Contribute to the evaluation, deployment and integration of new cyber security technologies as requirements evolve.

• Risk & Assurance: Support security assessments, vulnerability and patch management, audit activities and compliance with internal policies and recognised security standards.

• Continuous Improvement: Identify opportunities to improve tooling performance, automate repetitive tasks, reduce platform incidents and strengthen detection and control effectiveness.

• Stakeholder Management: Collaborate with cyber security specialists, infrastructure and engineering teams, vendors, audit and risk stakeholders, producing clear technical documentation and operational handovers.

Essential Skills & Experience

• 8+ years' experience in cyber security or information security, with strong hands-on experience operating and supporting enterprise security tooling.

• Proven experience managing multiple security platforms in complex enterprise environments, balancing BAU operations with engineering improvements and new implementations.

• Strong technical understanding of Windows Server, Linux, infrastructure, ne