Network Security And System Administrator

Description:

We are seeking a highly skilled Network Security & System Administrator to identify, remediate, and secure vulnerabilities across network and Windows system infrastructures. The ideal candidate will play a crucial role in protecting organizational assets, ensuring robust network security, and maintaining Windows environments.
This role requires expertise in network access control (ACLs), VLAN segmentation, privileged access management, Windows server hardening, and patch management to fortify IT infrastructure against cyber threats. If you're passionate about strengthening cybersecurity and mitigating risks, we’d love to hear from you!
Key Responsibilities:
Implement VLANs and ACLs for network segmentation.Configure firewall rules to block unauthorised access.Disable deprecated network protocols (e.g., SMBv1, Telnet, HTTP).Ensure secure network architecture to reduce attack surfaces.Harden Windows Server configurations.Enforce patch management policies for operating systems.Prioritize vulnerabilities based on risk impact.Work with teams to remediate identified issues.Track and verify successful remediation efforts. Vulnerabilities to Address:Insufficient Network SegregationUnsecured SMBv1Weak network access controlsPrivileged Accounts Not in Protected Users GroupWindows Server Update Services (WSUS) MisconfigurationMisconfigured Certificate ServicesUnpatched OS vulnerabilitiesWeak Privileged Access ControlsLack of MFA for Administrative AccountsMisconfigured Group Policies in Active DirectoryUnsecured Web-Based ServicesLack of Logging & Monitoring in Cloud ApplicationsInsecure API and Web App ConfigurationsMissing Security PatchesUnsupported Software VersionsWeak Security Configurations Identified in Scans
Skills & Experience Required✔ 5+ years of experience in networking and system administration (mandatory).✔ Strong expertise in firewalls, VLANs, ACLs, and Windows/Linux security hardening.✔ Proficiency in patch management, Active Directory security, and access controls.✔ Familiarity with vulnerability assessment tools and remediation processes.✔ Ability to work independently and remediate critical security vulnerabilities.
Location: Melbourne (Only Melbourne-based candidates should apply) Duration: Contract Role – 2 Months (with a possibility of extension) Experience Required: Minimum 5 years in Networking and System Administration✅ Eligibility: Student visa holders can apply, but 5 years of experience is mandatory