System Security Administrator

Job Description:

The System Security Administrator supports the Senior System Administrator in maintaining, monitoring, and securing a broad range of IT systems and infrastructure. The role includes hands-on work with Windows, Linux, and macOS environments, virtualization, networking, cloud platforms, and endpoint management. The ideal candidate will have a proactive mindset, a strong technical foundation, and the ability to support both daily IT operations and long-term strategic initiatives.

This role also plays a key part in maintaining a secure IT environment aligned with best practices and compliance standards such as ISO 27001.

Job Responsibilities:

• Assist in managing and mentoring the IT team to improve operational efficiency and technical capabilities
• Administer and support systems across Windows, Linux, and macOS platforms
• Maintain and manage Active Directory (AD), GPO, DNS, and DHCP services
• Configure and maintain network infrastructure including LAN/WAN/VPN
• Manage firewalls and network security appliances
• Support cloud platforms (AWS, Azure, Google Workspace, Microsoft 365)
• Deploy and manage Mobile Device Management (MDM) solutions
• Oversee endpoint security across desktops, laptops, and mobile devices
• Coordinate penetration testing and assist with remediation of security gaps
• Administer VMware environments and manage virtualized infrastructure
• Oversee storage systems (SAN/NAS), data backup, and disaster recovery procedures
• Ensure IT security and business continuity, submitting monthly reports as needed
• Maintain documentation for network diagrams, workflows, and system configurations
• Evaluate new technologies and recommend improvements to enhance security and productivity
• Ensure IT practices align with ISO 27001 standards (experience with ISO 27001 is a strong plus)
• Provide regular reports related to system health, security, and compliance metrics

Job Requirements

• Proficiency in Active Directory, Group Policy, and user account management
• Experience supporting macOS and Linux environments
• Strong foundation in networking (TCP/IP, VLANs, DNS, DHCP, routing)
• Hands-on experience with firewalls, VPNs, and network security tools
• Familiarity with cloud services such as AWS, Azure, or Google Cloud
• Knowledge of endpoint protection platforms and MDM tools
• Exposure to penetration testing practices and vulnerability remediation
• Solid experience with VMware (6.x or newer)
• Experience with MySQL or MongoDB databases
• Proficiency in Git and modern DevOps practices
• Familiarity with authentication systems (SSO, LDAP, SAML)
• Strong documentation, reporting, and communication skills
• Experience with ISO 27001 frameworks is a plus
• Ability to prepare and deliver clear and concise technical reports