Cyber Security Analyst L4

Test Triangle; Greater London; On-site; GBP 40,000 - 70,000; Full time

Job summary

A leading cybersecurity firm is seeking an experienced cybersecurity professional to provide 3rd Line support across various systems and platforms. The successful candidate will manage Windows Server and SQL Server, and maintain Linux environments, while enhancing cloud services and security solutions. With a strong background of 5-8 years in systems engineering and a commitment to customer-centric service, this role involves collaboration with stakeholders and mentoring junior staff. This position offers a full-time contract in Leatherhead, supporting critical business operations.

Qualifications

• 5-8 years' experience in infrastructure or systems engineering.
• Strong understanding of security/SaaS solutions.
• Ability to troubleshoot in hybrid environments.

Responsibilities

• Provide 3rd Line support across various environments.
• Implement and manage security platforms.
• Collaborate with stakeholders on operational improvements.

Skills

Windows Server Active Directory

SQL Server

Linux (Red Hat Satellite)

AWS

Azure

CyberArk

Splunk

PowerShell

Python

TCP/IP

Tools

WhatsUp Gold

VMware

Cisco

Dell Servers

Job description

Job Description

Location

Leatherhead (3 Daya a week)

Key Responsibilities

Provide 3rd Line support across Windows, Linux, cloud and security services.

Manage and optimise Windows Server Active Directory and SQL Server as the core enterprise platforms.

Administer and maintain Linux environments (Red Hat Satellite) alongside Windows services.

Support and enhance cloud services (AWS, Azure or similar) across compute, networking, storage, IAM and automation.

Implement and manage security/SaaS platforms including Tenable, CyberArk, Imperva, Akamai WAF, Okta, CrowdStrike, Proofpoint SafeBreach, Zscaler and Splunk.

Deliver infrastructure projects including upgrades, migrations and new deployments.

Proactively monitor systems, identify vulnerabilities and implement preventative measures.

Support business continuity and disaster recovery initiatives.

Provide input into solution designs, change‑control processes and operational standards.

Collaborate with stakeholders to define requirements and deliver operational improvements.

Maintain documentation including technical procedures and stakeholder reporting.

Mentor and support junior colleagues, sharing knowledge and best practices.

Be available when required for out‑of‑hours upgrades, maintenance and incident response.

Core Skills & Experience

Proven track record in senior infrastructure or systems engineering.

Strong experience with Windows Server Active Directory and SQL Server.

Good hands‑on experience with Linux (Red Hat Satellite).

Good knowledge of cloud platforms (AWS, Azure or similar).

Good understanding and administration of security/SaaS solutions: Tenable, CyberArk, Imperva, Akamai WAF, Okta, CrowdStrike, Proofpoint, SafeBreach, Zscaler, Splunk.

Strong knowledge of Fortinet security technologies (Firewalls, FortiManager, FortiAnalyzer).

Strong understanding of networking fundamentals (TCP/IP, VLANs, routing, firewalls).

Hands‑on experience with infrastructure monitoring platforms, particularly WhatsUp Gold.

Script* and automation skills (PowerShell, Bash, Python).

Proven ability to troubleshoot and resolve complex issues in hybrid environments.

Desirable Skills

Familiarity with VMware, Cisco and Dell Servers.

Experience working in regulated or change‑controlled environments.

Knowledge of high availability and disaster recovery solutions.

Exposure to DevOps CI/CD and automation frameworks.

Experience with Kubernetes and containerised environments.

Personal Attributes

Passionate about technology problem‑solving and innovation.

Analytical thinker with excellent troubleshooting skills.

Strong communication skills, able to work with technical and non‑technical audiences.

Highly motivated, detail‑oriented and able to deliver under pressure.

Team‑oriented, collaborative and capable of mentoring colleagues.

Do

Ensuring customer centricity by providing apt cybersecurity

• Monitoring and safeguarding log sources and security access
• Planning for disaster recovery in the event of any security breaches
• Monitoring for attacks, intrusions and unusual, unauthorized or illegal activity
• Performing moderately complex log reviews and forensic analysis to identify unauthorized or unacceptable access to data or systems
• Conducting security assessments, risk analysis and root‑cause analysis of security incidents
• Handling incidents escalated by the L1 team in 24x7 rotational shifts
• Using advanced analytics tools to determine emerging threat patterns and vulnerabilities
• Completing all tactical security operations tasks associated with this engagement
• Analysing all attacks and producing remedial attack analysis
• Conducting detailed analysis of incidents and creating reports and dashboards

Stakeholder coordination & audit assistance

• Liaise with stakeholders regarding cyber security issues and provide future recommendations
• Maintain an information security risk register and assist with internal and external audits relating to information security
• Assist with creation, maintenance and delivery of cyber security awareness training for colleagues
• Advise and guide employees on issues such as spam and unwanted or malicious emails

Deliver

No.

Performance Parameter

Customer centricity

Timely security breach solutioning to end users, internal stakeholders & external customers – experience.

Process Adherence

Adherence to SLA(s) (90‑95%) response time and resolution time TAT.

Mandatory Skills

Infrastructure Security Consulting.

Experience

5‑8 Years.

Employment Type

Full Time

Vacancy

1