GCS
Lead SOC Analyst (L3)
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Lead SOC Analyst (L3)
Senior Security Analyst
Location: Portsmouth (Hybrid – 2-3 days onsite per week) Salary: £47,000 – £50,000 + Career Progression Opportunities
We are seeking an experienced Senior Security Analyst to join a growing cybersecurity team supporting a range of enterprise clients within a fast-paced managed services environment. This is an excellent opportunity for a security professional with strong MSSP experience who is looking to take the next step in their career, with a clear pathway into a future SOC Manager position. This role offers exposure to a broad security landscape, opportunities to influence operational maturity, and long-term progression into leadership, with the potential to progress into a SOC Manager role over the coming years.
Key Responsibilities Monitor, investigate, and respond to security incidents across multiple client environments Perform threat detection, triage, analysis, and remediation activities Lead incident response activities and provide technical guidance to junior analysts Analyse alerts from SIEM, EDR, IDS/IPS, and other security tooling Conduct threat hunting and proactive security monitoring Support continuous improvement of SOC processes, playbooks, and operational procedures Collaborate with infrastructure and engineering teams to strengthen security posture Produce detailed incident reports and client-facing documentation Assist with vulnerability management and security compliance activities Contribute to mentoring and development of junior team members
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Required Experience Proven experience working within an MSSP environment Strong background in Security Operations / SOC environments Experience with SIEM platforms such as Microsoft Sentinel, Splunk, QRadar, or similar Knowledge of EDR technologies and incident response methodologies Strong understanding of network security, firewalls, endpoint security, and threat intelligence Experience investigating and responding to security incidents in enterprise environments Excellent analytical and problem-solving skills Strong communication and stakeholder management abilities
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Desirable Skills Relevant certifications such as Security+, SC-200, CySA+, CISSP, or similar Experience with cloud security technologies (Azure, AWS, Microsoft 365) Knowledge of MITRE ATT&CK framework and threat hunting methodologies Scripting or automation experience (PowerShell, Python, etc.)
What’s on Offer Hybrid working model (2-3 days onsite in Portsmouth) Clear progression pathway into SOC leadership Opportunity to grow into a SOC Manager role with future earning potential around £80,000 Supportive and collaborative security team environment Exposure to enterprise-scale security operations and technologies Ongoing professional development and certification support
This role would suit an ambitious Senior Security Analyst who is looking for long-term growth, leadership development, and the opportunity to help shape the future of a growing SOC function.
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