Tech lead - SOC responder

Colt; City of London; On-site; GBP 60,000 - 80,000; Full time

Job summary

A leading telecommunications company is seeking a Tech Lead – SOC Responder to oversee security operations and incident response. In this role, you will manage security services, analyze incidents, and enhance security processes. Ideal candidates possess strong cybersecurity skills and experience with SIEM tools. This full-time position is based in London and offers a dynamic work environment with a commitment to diversity and employee development.

Benefits

Flexible working hours and remote work options

Extensive induction program with mentors

Opportunities for further development and education

Global family leave policy

Employee assistance program

Qualifications

• Information Security Incident Response experience focusing on detection and response using log data.
• Strong networking and systems experience in an enterprise environment.
• In‑depth understanding of information security and the threat landscape.
• Strong scripting skills in Python, PowerShell, Unix shell.
• Deep knowledge of cyber security operations, monitoring, endpoint (EDR), network and SIEM tools.

Responsibilities

• Support SOC Manager to deliver SIEM and IR tools management.
• Operate technology escalation support and security solution assessment.
• Analyze infrastructure security incidents for legitimate breaches.
• Establish security incident response processes and investigations.
• Monitor and report on effectiveness of security technologies.

Skills

Network protocols

Cyber security tools and products

Cyber security policy management

Cyber security planning

Cyber security risk management

Education

Degree in Information Technology, Engineering or related field

SIEM management experience

Job description

Colt provides network, voice and data centre services to thousands of businesses around the world, allowing them to focus on delivering their business goals instead of the underlying infrastructure.

Tech Lead – SOC Responder

What You Will Do

• Support SOC Manager to delivery SIEM, IR tools platform management including design, implementation, administration, use‑case creation, connector deployment, and health checks.
• Operate technology escalation support, security solution assessment, build activities and service maturing.
• Analyse potential infrastructure security incidents to determine whether they qualify as a legitimate security breach.
• Establish and govern security incident response processes, investigations and operational processes.
• Maintain and enhance the formal service catalogue, descriptions, targets and performance metrics.
• Ensure security services, tools and platforms are adequately maintained.
• Monitor and report on the effectiveness of security‑enforcing technologies, identifying risks and KPIs and producing management information.
• Contribute to the design, development and maintenance of security standards and controls.
• Align team goals and plans with Colt’s long‑term priorities and strategy.
• Develop and grow talent and people capability within the security teams.

Key Performance Indicators

• Own understanding of expectations for self and team and ensure delivery.
• Proactively seek leadership feedback and use it to improve personal performance.
• Review working methods to recommend and deliver improvements.
• Leverage cultural differences to build rapport across teams and secure necessary cooperation.

What We’re Looking For

• Information Security Incident Response experience focusing on detection and response using log data.
• Strong networking and systems experience in an enterprise environment.
• In‑depth understanding of information security and the threat landscape.
• Strong scripting skills (Python, PowerShell, Unix shell).
• Experience throughout the SDLC.
• Deep knowledge of cyber security operations, monitoring, endpoint (EDR), network and SIEM tools.
• Prior SOC experience preferred.
• Extensive knowledge of network and server security protocols, technologies and products.
• Industry‑recognized certifications (CISSP, GCIH, GCFA, OSCP, etc) preferred.
• Strong oral and written communication skills.
• Relentless curiosity and attention to detail.
• A quick learner who applies prior experience to solve current challenges.
• Challenge status‑quo mindset.

Qualifications

• Combination of a degree in Information Technology, Engineering or related field.
• SIEM management experience; advanced certification from vendors such as ArcSight, MS Sentinel or LogRhythm is desirable.

Skills

• Network protocols
• Cyber security tools and products
• Cyber security policy management
• Cyber security planning
• Cyber security risk management

What We Offer You

At Colt, you’ll make a difference. We empower people, giving them opportunities to inspire and lead teams while working on high‑impact projects that connect people, cities, businesses and ideas.

Diversity & Inclusion

• We value diversity of thought and experience and encourage authentic expression from day one.
• We welcome people from all backgrounds, regardless of gender identity, sexual orientation, race, religion, disability, neurodiversity, age, marital status, pregnancy or place of birth.

Most Recently We Have

• Signed the UN Women Empowerment Principles guiding our Gender Action Plan.
• Trained over 60 Colties as Mental Health First Aiders.
• Offer recruitment process adjustments for candidates needing support.

Benefits

• Flexible working hours and remote work options.
• Extensive induction program with mentors and buddies.
• Opportunities for further development and education.
• Global family leave policy.
• Employee assistance program.
• Internal inclusion & diversity employee networks.

A Global Network

• Join a global network of colleagues and showcase your work on the ‘Our People’ site, including Empowered Women in Tech.

Job Details

• Seniority level: Mid‑Senior
• Employment type: Full‑time
• Job function: Engineering and Information Technology
• Industry: Telecommunications
• Location: London, England, United Kingdom

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