IT Cyber Security Analyst – Tier 3

Come and join the Littlefish team!

Work location:
Nottingham (Hybrid)

Salary:
Up to: £55,000

Must be eligible for SC Clearance (UK resident for the last 5 years) and NPPV2 clearance

Here at Littlefish, we look for people who can make areal difference and become a giant slayer.

As the world around us continues to change, we look for people who grab that change with optimism and excitement.

Theseare the passionate and high performingpeoplewho enjoy and thrive on thinking outside the box.

Our current employees are the giant slayers who have made Littlefish who we are today, and you will be the future employees who continue to add the drive, passion, andadd toour skills and experience as we see Littlefish grow.

So, if this is ticking your boxes and you are excited at the thought of working with creative, passionate, energetic, friendly people- we would love to hear from you.

As a Tier 3 Cyber Security Analyst, you’ll work within the CSOC to detect, investigate, and respond to advanced security threats across customer environments. You’ll support the CSOC Manager in day‑to‑day operations, act as a technical escalation point for analysts, and provide out‑of‑hours escalation support when required.

This is a highly technical, hands‑on role where you’ll lead threat hunting, develop and tune SIEM detections, and help mature SOC processes and response playbooks. You’ll also play a key role in mentoring analysts and raising the overall technical capability of the SOC.

Technology innovation is part of our DNA, and this role will continue to evolve as AI‑driven detection, automation, and response capabilities are introduced.

• Develop, tune, and maintain SIEM detection rules across customer environments
• Conduct proactive threat hunting and threat intelligence research
• Act as a senior escalation point for Cyber Security Analysts
• Coach and mentor analysts, supporting skills development and knowledge sharing
• Investigate complex security incidents and identify root causes
• Lead continual service improvement initiatives within the CSOC
• Compile and present monthly SOC reporting, advising on security posture improvements
• Support client service reviews and articulate cyber risk in business‑friendly language
• Conduct security assessments, including vulnerability testing and risk analysis
• Ensure high‑quality incident resolution and consistent SOC performance

You’re an experienced cyber security professional with deep SOC experience and a strong technical foundation. You’re confident making decisions in high‑pressure situations, enjoy solving complex security challenges, and take pride in supporting and developing others.

You balance technical excellence with a service‑delivery mindset and strong customer engagement.

• 2–4 years’ experience in a Security Operations or similar cyber role
• Strong experience investigating and responding to cyber security incidents
• Hands‑on experience with SIEM, EDR, and email security tooling
• Experience working in a Microsoft XDR SOC
• Strong KQL (Kusto Query Language) skills
• Experience mentoring and supporting analysts at different levels
• Excellent written and verbal communication skills
• Strong analytical thinking, judgement, and attention to detail
• A proactive, self‑motivated approach and passion for cyber security

• Certifications such as AZ‑500, SC‑300, SC‑100, SC‑200, or SANS certifications
• Experience as an incident responder
• Experience developing bespoke detection rules or response playbooks
• Knowledge of vulnerability assessment and remediation
• Awareness of balancing business needs with technical and security standards

• Healthcare cash plan. This will give you access to online GP appointments, 24/7 access to qualified counsellors and cash back against a range of general healthcare
• Referral bonus scheme of £1000 when you successfully refer a friend.
• Access to our Linked In Learning platform, with over 16000 expert‑led online tutorials to enhance and achieve your personal and professional goals.
• Casual dress policy
• Company Pension Scheme
• Company social events
• 25 days annual leave plus…