IT Operations Platforms and Security Lead

Onyx-Conseil; Greater London; Hybrid; GBP 85,000 - 100,000; Full time

Job summary

Onyx-Conseil is seeking an IT Operations Platforms and Security Lead based in London. This hybrid role requires hands-on IT infrastructure leadership, managing a small team, stakeholders and vendors to ensure stable, secure and efficient global platforms. You will oversee Microsoft 365, Azure, Exchange Online, IAM, security monitoring and DR/BCP, driving continual service improvement while aligning with governance and regulatory requirements. The position offers £85k–£100k plus benefits.

Qualifications

• Experience managing Microsoft 365, Azure, Exchange Online and security tools.
• Strong leadership of IT operations, risk management and vendor relationships.
• Knowledge of ISO 27001, NIST, GDPR and SOC2 compliance.

Responsibilities

• Lead a small IT team and coordinate with stakeholders and vendors.
• Ensure stability, security, and efficiency of global platforms.
• Drive continual service improvement and transformational delivery projects.
• Oversee cloud-first governance and cost-efficiency in outsourced services.
• Oversee DR/BCP plans and regular tests.

Skills

Team leadership

IT infrastructure

Cloud security

Azure

M365

IAM

SOC/SIEM

Vendor management

BCP/DR planning

Zero trust

Tools

Intune

Azure AD

Firewall

Cisco Meraki

Versa SD-WAN

CheckPoint

Cloudflare

SIEM tools

Microsoft Defender

Job description

IT Operation s Platforms and Security Lead

This role requires excellent management of a small team in IT along with managing stakeholders and vendors.

You must be hands‑on technically in IT Infrastructure.

The IT Operational Platform and Security Lead is responsible for overseeing the organisation’s IT operations, ensuring the stability, continuity, security, and efficiency of its technology platforms within a global commercial insurance environment. While Microsoft technologies (Microsoft 365, Azure, Exchange Online) form a core part of the infrastructure, the role also encompasses broader enterprise IT systems, multi layered networking, security, data management, and third‑party platforms that support global business operations and the associated applications estate.

The role requires a proactive leader who can drive IT operational excellence, manage security risks, focus on continual service improvement, drive transformational delivery projects, and work effectively with internal stakeholders and third‑party vendors to deliver a high‑quality Global IT services. Working in line with the Architecture defined IT principle of a "buy before build" environment, the individual will need to ensure that outsourced and cloud‑based services are robust, cost‑effective, and aligned with business needs and the Strategic IT vision. They will also play a key role in enhancing cybersecurity, protecting data and systems, driving transformative operational change, enhancing IT processes and ensuring compliance with governance bodies and industry regulations.

Due to the nature of the role, complexity

Security, Compliance & Risk Management

• Define and enforce cloud security policies, identity management, and access controls to protect systems, networks, and data.
• Oversee the adoption of zero‑trust security principles to enhance protection across cloud platforms.
• Manage identity and access management (IAM) in a cloud‑first environment, including Azure AD, MFA, Conditional Access, SSO, and Privileged Access Management (PAM).
• Lead threat monitoring, detection, and response using cloud‑native security solutions such as Microsoft Defender, Sentinel, and SIEM platforms.
• Ensure compliance with cloud security frameworks and regulatory requirements (ISO 27001, NIST, GDPR, SOC2, FCA).
• Conduct regular security risk assessments, penetration tests, and vulnerability management across cloud services.
• Oversee endpoint security, cloud network and API security for robust protection across all assets
• Define, manage and maintain accurate DR and BCP plans for the infrastructure area with biannual tests.

Technical Experience

• Microsoft Azure Infrastructure design and administration, including topology, Azure networking, services, and component knowledge,
• Microsoft AD (Entra), Server and SQL experience,
• O365 administration and design
• Global Software Patching and estate management via Intune
• Firewall (Azure, CheckPoint and Cloudflare), DNS, VPN, WIFI and Local Area Network design & administration experience
• Software Defined Networking (Cisco, Meraki, Versa)

Key Skills

• Microsoft 365 & Azure: Strong experience managing Microsoft 365 (Exchange, SharePoint, Teams), Azure cloud infrastructure, and security tools such as Microsoft Defender and Sentinel.
• Security & Compliance: Deep knowledge of security frameworks (ISO 27001, NIST, CIS), compliance requirements (GDPR, SOC2), and risk management best practices.
• Identity & Access Management (IAM): Expertise in Azure AD, MFA, Conditional Access, Single Sign-On (SSO), and Privileged Access Management (PAM).
• Threat Management & Incident Response: Ability to detect, respond to, and mitigate cyber threats using SIEM, endpoint security, and vulnerability management tools.
• Networking & Infrastructure Security: Understanding of firewalls, VPNs, SD-WAN, DNS security, endpoint protection, and cloud security controls.
• IT Service Management & Automation: Experience implementing ITIL-based service management, automating operational tasks, and optimising service delivery. Operational & Leadership Skills:
• IT Operations & Service Continuity: Ability to ensure IT systems are highly available, resilient, and fit for purpose, with a strong focus on business continuity and disaster recovery.
• Supplier & Vendor Management: Experience managing third‑party IT vendors, MSPs, and SaaS providers, ensuring service levels, performance, and cost-effectiveness.
• Project Leadership & Change Management: Ability to lead technology projects, system upgrades, and platform migrations, ensuring smooth execution and minimal business disruption.
• Process Improvement & Automation: Strong analytical mindset to identify inefficiencies, automate workflows, and enhance security controls. Soft Skills & Mindset:
• Problem‑Solving & Decision‑Making: Capable of making informed decisions and resolving complex IT issues in a fast‑paced environment.
• Stakeholder Engagement: Ability to communicate effectively with technical and non‑technical stakeholders, including senior leadership and business users.
• Resilience & Adaptability: Comfortable working in an evolving technology landscape, with a proactive and security‑first approach.

Summary of Skills Required:

• Global Enterprise level Infrastructure Management position for the last 5 years,
• Global team management (human resources, strategic delivery, operational service, audit lead for Infra, budget..)
• Key - 3 party operational infrastructure vendor management - i.e management of managed service partners,
• Migration of Legacy VM based estates to SaaS and Cloud services platforms,
• Legacy tech to Azure knowledge/experience,
• Prior to the last 5 years, a technical infrastructure engineering level background, working on Windows Server, AD , SQL environments, Firewalls/SDWAN, and Networks (WAN &/or LAN).

The Client is based in the City of London.

This is a hybrid position with 3 days in the office.

The salary for this role will be in the range £85K - £100K plus Benefits.