2nd Line IT Support Engineer - Cross-Platform & Security

Open Cosmos Ltd.; Cromhall; Remote; GBP 40,000 - 56,000; Full time

Job summary

Open Cosmos Ltd. is seeking an IT Systems Administrator to own and resolve escalated issues across Windows, Linux, macOS and mobile platforms, including networks, identity, and collaboration tools.

You will administer M365/Entra ID, IAM and MFA, manage Endpoint configurations with Intune/Jamf/MDM, and drive automation through scripting. This role supports deployment upgrades and maintains security best practices.

Qualifications

• Strong troubleshooting across Windows, Linux, macOS, mobile OS and SaaS platforms.
• Experience administering M365, Entra ID, IAM, MFA/SSO, device compliance and EDR/AV.
• Familiarity with ITSM/ticketing, change control and documentation.
• Scripting/automation (PowerShell/Bash) a plus.
• Clear communication translating tech concepts for non-technical users.

Responsibilities

• Own and resolve escalated issues across Windows, Linux, macOS, iOS/Android, networks, identity, and collaboration tools.
• Troubleshoot, perform root-cause analysis, and implement corrective actions.
• Meet SLAs and communicate with users and stakeholders.
• Administer Google Workspace, SSO/IAM, MFA and support migration to M365/Entra ID.
• Manage endpoints using Intune/Jamf/MDM; software packaging and secure baselines.
• Support LAN/WLAN/VPN/DNS/DHCP/firewall changes and monitoring; liaise with providers.
• Manage device lifecycle: builds, replacements, RMAs, onboarding/offboarding.
• Contribute to deployments and upgrades (office builds, Wi‑Fi refresh, EDR rollouts, migrations).
• Improve automation, self-service, reporting and monitoring through scripting and tooling.
• Champion security best practice across patching, hardening, device compliance, and access controls.

Skills

Troubleshooting across OS

Administering M365 & Entra ID

IAM & MFA/SSO

Scripting/Automation (PowerShell/Bash)

Tools

Intune

Jamf

MDM

PowerShell

Bash

Job description

Open Cosmos Ltd. is seeking an IT Systems Administrator to own and resolve escalated issues across Windows, Linux, macOS and mobile platforms, including networks, identity, and collaboration tools.

You will administer M365/Entra ID, IAM and MFA, manage Endpoint configurations with Intune/Jamf/MDM, and drive automation through scripting. This role supports deployment upgrades and maintains security best practices.