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

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

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.