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Senior security analyst

Portsmouth
Permanent
Security analyst
Posted: 2 March
Offer description

About Us We’re a people-first, values-led $1B global service provider delivering end-to-end IT Outsourcing (ITO) including Cyber Defence services to clients of all sizes, from dynamic scale-ups to large enterprise and public sector environments. Our Security Practice helps clients stay secure through service capabilities such as Managed Detection and Response (MDR), Threat Hunting, Vulnerability Management, Penetration Testing, and Incident Response, and our Security Advisory delivers consulting led projects. We’re growing fast and investing heavily in our people, platforms, and capability. If you want to make an impact in a collaborative environment where your development and wellbeing are genuinely valued, you’ll fit right in here at Bell. The Opportunity As a Senior Security Analyst in our Security Operations Centre (SOC), you’ll take a leading role in identifying, investigating, and responding to cyber threats across diverse client environments. You’ll mentor junior analysts, lead complex incident investigations, and help shape the evolution of our detection and response capabilities. This role suits a passionate security professional with a strong technical background, a collaborative mindset, and a desire to grow into future leadership or specialist roles such as SOC Lead, Threat Hunter, Security Engineer, or Incident Responder. What You’ll Be Doing Lead advanced analysis and investigation of security incidents, identifying root causes and recommending corrective actions. Provide technical and procedural guidance to junior analysts within the SOC. Develop and refine detection use cases, correlation rules, and playbooks in SIEM and EDR platforms (e.g. Microsoft, Elastic, Palo Alto…). Perform proactive threat hunting across customer environments. Collaborate with engineering teams to enhance visibility, telemetry, and automation. Support major incident response activities and coordinate cross-team remediation efforts. Produce detailed incident reports and contribute to client-facing communications when required. Help shape SOC maturity by contributing to process improvement, training, and knowledge sharing. What We’re Looking For Essential: 2–4 years’ experience working in a SOC, CSIRT, or cyber defence environment. Strong understanding of attack methodologies (MITRE ATT&CK, Cyber Kill Chain). Hands-on experience with SIEM and EDR tools (e.g. Microsoft Sentinel, Defender, Splunk, CrowdStrike). Experience in triage, containment, and incident response. Solid understanding of network protocols, Windows/Linux operating systems, and cloud security (M365, Azure, AWS). Excellent communication and analytical skills — able to explain complex issues clearly to both technical and non-technical audiences. Passion for continuous learning and knowledge sharing. Desirable: Experience with automation or scripting (PowerShell, KQL, Python). Exposure to threat hunting or threat intelligence. Experience mentoring or coaching junior team members. Working knowledge of vulnerability management or forensic analysis. What We Offer: Competitive salary Hybrid working and flexible hours Funded training and professional certifications Access to cutting-edge security tools and threat intelligence feeds Pension, healthcare, and wellbeing support Inclusive culture built around collaboration, trust, and personal growth Defined career progression pathways Join Our Cyber Defence Team We’re more than a service provider, we’re a team of passionate professional people who care deeply about protecting our clients and developing each other. If you’re looking for a place where your skills are valued, your voice is heard, and your career can grow in multiple directions, we’d love to have you on the journey. Apply today and help us build the next chapter of our Cyber Defence success story.

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