Senior IT Administrator Full Time

We are looking for an experienced IT Infrastructure, Network & M365 Security Engineer to manage and secure our IT environment. This role includes handling firewalls, network infrastructure, Microsoft 365, and supporting end-user systems.

Key Responsibilities

Infrastructure Management :

• Manage and maintain servers, networks, and IT infrastructure
• Ensure system availability, performance, and scalability
• Handle patching, upgrades, and lifecycle management

Network & Firewall Management

• Configure and manage firewalls (Sophos,)
• Implement firewall policies, NAT, VPNs
• Monitor network traffic and respond to incidents
• Conduct firewall audits and rule optimization

Microsoft 365 (M365) Administration

• Manage M365 services (Exchange, SharePoint, Teams, OneDrive)
• Administer Azure AD / Entra ID
• Implement MFA, SSO, Conditional Access
• Configure Microsoft Defender
• Manage email security (SPF, DKIM, DMARC)
• Implement DLP, retention, eDiscovery
• Monitor logs and investigate issues
• Manage devices via Intune

End-User & Laptop Support

• Install and configure Windows OS
• Troubleshoot software and OS issues
• Perform laptop health checks
• Ensure endpoint security compliance
• Support users with system access

Security & Compliance

• Implement security best practices
• Support SOC 2 / ISO 27001 audits
• Conduct vulnerability assessments

Monitoring & Incident Management

• Set up monitoring and alerts
• Troubleshoot outages and incidents
• Work with SIEM tools

Documentation

• Maintain documentation and Skills :
• Firewall experience (Sophos/Palo Networking (TCP/IP, DNS, VPN)
• M365 administration
• Azure AD / Entra ID
• Windows OS troubleshooting
• End-user support experience

Nice To Have

• Cloud (AWS/Azure/GCP)
• Docker / containerization
• SIEM tools
• Certifications (Microsoft, AWS, CCNA, CISSP)
• Zero Trust knowledge

(ref:hirist.tech)