Cybersecurity Managing Consultant

Cerillion is a leading provider of billing, charging and customer management systems with more than 25 years’ experience delivering its solutions to the telecoms sector.

We are seeking a technically strong and experienced Infrastructure/Security Manager to lead our IT operations and cybersecurity initiatives. The ideal candidate will combine hands-on technical expertise with leadership capabilities, driving our IT strategy and ensuring the scalability, security, and high performance of all IT systems and services.

Key responsibilities include:

• Managing the Global Infrastructure team.
• Designing, implementing, and maintaining secure and scalable IT infrastructure.
• Leading IT projects, network upgrades, and enterprise application deployments.
• Configuring and managing server and network hardware, virtualised infrastructure, Active Directory, Windows and Linux systems.
• Administering firewalls, VPNs, and endpoint security solutions, ensuring zero-trust security models.
• Implementing and enforcing cybersecurity best practices (ISO 27001, CE+, CIS benchmarks), including endpoint protection, vulnerability scanning, penetration testing, and incident response planning.
• Office 365, Exchange Online, and SharePoint administration.
• Deploying and managing backups, disaster recovery (DR) plans, and business continuity strategies.
• Overseeing IT support operations, ensuring SLA compliance and service excellence.
• Evaluating, recommending, and implementing ITSM tools and automation solutions to streamline IT operations.
• Managing IT budgets, licensing, procurement.
• Ensuring compliance with regulatory standards such as GDPR.
• Preparing detailed technical documentation for systems, processes, and user training.

What we are looking for in our next Project Manager:

• 10+ years’ experience of hands-on IT infrastructure and operations management.
• Strong expertise in:
  • Microsoft technologies (Windows Server, Azure Active Directory)
  • Virtualisation platforms (VMware ESXi, Proxmox)
  • Networking including Layer 2/3 switching, routing, VLANs, VPN.
  • Cloud environments (IBM Cloud, AWS, Azure) – deployments, architecture, cost optimisation.
• Proficient in backup and disaster recovery technologies.
• Deep understanding of cybersecurity frameworks and tools (EDR, SIEM, MFA, PKI, DLP).
• Nessus VAPT reporting and remediation.
• Strong leadership, mentoring, and team management capabilities.
• Ability to communicate complex technical information to non-technical stakeholders.
• Critical thinking, analytical problem-solving, and decision-making skills.

Desirable 

• Microsoft Certified Professional.
• AWS Certified Solutions Architect – Associate / Professional.
• VMware Certified Professional (VCP).

What we provide:

• Competitive salary.
• 23 days annual leave (+ bank holidays), increasing to 28 days after 5 years’ service.
• Vitality healthcare cover.
• Cycle-to-work scheme.
• Hybrid working.
• Opportunities for internal and external training.
• Employee Assistance Program.
• Opportunities for travel.
• An office in the heart of Covent Garden, providing an excellent base for our team events and social functions.