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# Senior Systems Engineer

- **Company:** Eze Castle Integration
- **Location:** London, UK
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Microsoft Windows, Active Directory, Domain Controllers, Antivirus Softwares, Systems Engineering, Microsoft Azure, Microsoft Online Services, Computer Networks, Disaster Recovery, Multi-Factor Authentication, Microsoft Exchange Server, Hyper-V, Mobile Application Software, Microsoft Operating Systems, Windows Servers, Azure Active Directory, Runbook, Microsoft SharePoint, Security Information and Event Management, Software Deployment, Systems Integration, VMware VSphere, Software Vulnerability Management, SSL Certificate Management, Cloud Platform System, Microsoft InTune, Microsoft Onedrive, Information Technology, Malware Detection, 3-tier Architectures
- **Published:** September 8, 2026
- **Apply:** https://www.collegerecruiter.com/job/2840675243-senior-systems-engineer

## About the Role

* Bachelor's degree in an Information Technology related field, or a minimum of 6+ years comparable experience in a technology administration role
 * Advanced knowledge of Microsoft Operating Systems such as Windows Server and Windows 10/11
 * Advanced administration experience with Public Cloud platforms with focus in Microsoft 365 and Azure (Azure AD, Exchange Online, SharePoint Online, OneDrive for Business, Teams, Intune)
 * Experience in administration of e-mail platforms and security integrations such as Exchange Online
 * Experience in virtualization administration on platforms such as VMware vSphere and Hyper-V
 * Proficient in incident response management during security events and high-priority escalations, as well as disaster recovery and business continuity activations
 * English written and spoken language skills required.

Bonus points if you have:

 * Experience with Managed Service Providers (MSP) preferred
 * Financial Services or Life Science industry experience a plus

## Description

* Provide advanced support of cloud infrastructures such as Microsoft 365/Azure (Azure AD, Exchange Online, SharePoint Online, OneDrive for Business, Teams, Intune)
 * Collaborate with, and act as a tier 3 escalation point for Client Technology Management, Service Desk, Engineering, and other client support teams
 * Implement and manage enterprise mail platform and security systems such as Microsoft Exchange or Exchange Online
 * Act as a Technical Lead for migrations, implementations, relocations, etc
 * Take ownership of complex technical challenges and provide long term fixes based on root cause analysis
 * Document processes and procedures which explain system functionality or regular tasks to contribute to our internal knowledge base including architecture diagrams, runbooks, and standard operating procedures (SOP)
 * Audit undocumented client environments and provide technical recommendations based on findings
 * Apply best-practice configurations to client security platforms such as Azure Active Directory Conditional Access, DUO Multifactor Authentication (MFA) services
 * Perform system maintenance tasks including software and operating system patching, software version upgrades, critical patch applications, and vulnerability remediation
 * Provide advanced support of Active Directory such as Domain Controller upgrades, Group Policy creation, scheduled software deployments, network policy maintenance, and certificate management
 * Interface with common technology support tools such as Remote Monitoring and Management (RMM), Mobile Device/Mobile Application Management, Anti-Virus/Anti-Malware


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