Cloud-First Platform & Cyber Security Specialist

Ashdown Group; Greater London; Hybrid; GBP 55,000 - 65,000; Full time

Benefits offered by this job

Generous pension

Hybrid work arrangement

Job summary

Ashdown Group seeks a Platform & Cyber Security Specialist to work in a large organisation undergoing an IT transformation. The role focuses on securing a cloud-first environment and leading security controls throughout the Microsoft stack in a hybrid setup with three days in the North West London office and two remote days.

You will manage Microsoft Entra end to end, configure security across Office 365 and endpoints, and monitor threats with Defender and Sentinel while maintaining DNS/DHCP

Qualifications

• Experience delivering and securing cloud-first environments.
• Hybrid Exchange Online and on-premises experience.
• Hands-on with Microsoft Entra ID: CA, MFA, SSPR, PIM, and identity lifecycle.
• Experience with Defender products (Defender 365) and Sentinel.
• Strong knowledge of DNS, DHCP, and certificate services.
• Proficient in PowerShell scripting and automation.

Responsibilities

• Own platforms, cyber security controls and emerging technologies underpinning the digital environment.
• Manage Microsoft Entra end to end including Entra Connect, ID objects, licensing, and security controls.
• Configure security across Office 365 and endpoints, including Defender RBAC and Cloud Apps.
• Monitor, investigate, remediate threats, generate audits and reports.
• Safeguard the organisation from spam/phishing via Microsoft 365 email remediation and retention policies.
• Maintain SSL certificates and VPN estate; uphold a robust security posture.

Skills

Cyber security

IAM

MS security best practices

Hybrid Exchange

Active Directory

Intune management

Tools

Microsoft Entra

Defender 365

Defender for Cloud Apps

PowerShell

DNS/DHCP

SSL certificates

VPN technologies

Job description

Ashdown Group seeks a Platform & Cyber Security Specialist to work in a large organisation undergoing an IT transformation. The role focuses on securing a cloud-first environment and leading security controls throughout the Microsoft stack in a hybrid setup with three days in the North West London office and two remote days.

You will manage Microsoft Entra end to end, configure security across Office 365 and endpoints, and monitor threats with Defender and Sentinel while maintaining DNS/DHCP