Senior System and Network Administrator

Senior System and Network Administrator

We are seeking a highly skilled and experienced Senior System and Network Administrator to join our dynamic IT team. This role is responsible for the day-to-day operations, maintenance, and enhancement of our enterprise-level IT infrastructure.

The ideal candidate will have a proven track record in system and network administration, with a strong focus on infrastructure operations, implementation, and security. This role requires a deep understanding of Microsoft 365 services, as well as a commitment to maintaining high system availability, reliability, and performance.

Responsibilities

• Monitor, maintain, and troubleshoot physical and virtual servers, network devices, and related infrastructure.
• Respond to and resolve incidents escalated from the Help Desk or monitoring systems.
• Perform regular system patching, backup verification, and disaster recovery testing.
• Administer user accounts, permissions, and directory services across on-premises and cloud environments.
• Plan and execute small to medium infrastructure enhancements and upgrades.
• Deploy, configure, and maintain servers, virtual machines, and network equipment.
• Implement firewall rule modifications, network reconfigurations, and infrastructure improvements as required.
• Administer Microsoft 365 services, including Exchange Online, Microsoft Teams, SharePoint Online, and Microsoft Entra ID.
• Configure and maintain security features such as Multi-Factor Authentication (MFA) and Conditional Access.
• Monitor Microsoft 365 service health and resolve operational issues.
• Support the implementation and maintenance of NCA Essential Cybersecurity Controls (ECC).
• Participate in internal audits and remediation activities to maintain regulatory compliance.
• Collaborate with cybersecurity teams to improve infrastructure security posture.

Qualifications

• Bachelor's degree in information technology, Computer Science, Computer Engineering, Network Engineering, Cybersecurity, or a related field.
• Minimum of 3 years of experience in System and Network Administration.
• Experience managing enterprise IT infrastructure in production environments.
• Experience with Microsoft 365 administration.
• Experience implementing and maintaining IT security best practices.
• Familiarity with NCA ECC requirements is required.

Technical Skills

• Windows Server Administration
• Basic Linux Administration
• VMware, Hyper-V, or other virtualization platforms
• TCP/IP Networking, VLANs, Routing, Switching, and VPN technologies
• Active Directory & Microsoft Entra ID
• Microsoft 365 Administration
• Backup and Disaster Recovery Solutions
• Infrastructure Monitoring Tools
• FortiGate Firewall Administration (Preferred)
• Network Security Fundamentals

Preferred Certifications

• Fortinet NSE 4 (or higher)
• Microsoft Certified: Microsoft 365 Administrator (MS-102)
• Cisco CCNA
• CompTIA Network+

Soft Skills

• Strong analytical and troubleshooting skills.
• Excellent problem-solving abilities.
• Ability to work independently and collaboratively.
• Strong communication and documentation skills.
• Ability to prioritize tasks and perform effectively under pressure.
• Attention to detail and commitment to operational excellence.