IT Systems Administrator

The IT Network and Infrastructure Security Specialist is responsible for the administration, security, and resilience of the organization’s network, server, and Microsoft cloud infrastructure. This role ensures secure configuration, monitoring, and maintenance of enterprise IT systems, including firewalls, switches, wireless networks, identity platforms, physical and virtual servers, and cloud environments.

The specialist works closely with IT, infrastructure, and security teams to safeguard systems against threats, maintain high availability, and support security initiatives across the organization. This position requires strong hands-on experience in IT infrastructure administration as well as practical security administration expertise.

This position follows a hybrid schedule, with four days per week in the office and one day working from home.

• Manage, maintain, and troubleshoot network infrastructure, including switches, routers, firewalls, VPN appliances, and wireless systems.
• Administer Windows and Linux servers, virtualization platforms (VMware / Hyper-V), and enterprise storage solutions.
• Ensure network performance, availability, and uptime through proactive monitoring and maintenance.
• Implement and maintain secure configurations, patching, hardening standards, and baseline system builds.

• Manage and monitor security tools, including Identity Management (OKTA), Mobile Device Management (MDM), Remote Monitoring and Management (Ninja One), firewalls, IDS/IPS, vulnerability scanners, and identity security platforms.
• Assist Security Analysis with SIEM and EDR administration support.
• Maintain endpoint security policies, access controls, MFA, privileged accounts, and identity governance settings.
• Perform and validate vulnerability scans, system hardening, and remediation of infrastructure weaknesses.
• Ensure network segmentation, zero-trust controls, and secure access principles are implemented across environments.

• Participate in incident response activities, supporting containment, remediation, and recovery actions.
• Help investigate security alerts, perform triage, and support containment, eradication, and recovery activities.
• Conduct root-cause analysis and contribute to strengthening security controls to reduce recurrence.
• Maintain incident documentation, reporting, and continuous improvement of response processes.
• Collaborate with third-party security partners (SOC/MDR) on detection and mitigation activities.

• Support risk assessments across network, server, cloud, and identity systems.
• Document, track, and support remediation of risks and vulnerabilities across infrastructure assets. Assist with IT and security policy enforcement, compliance audits, and regulatory alignment (NIST, CIS, SOC 2, GDPR, CCPA).
• Participate in building and maintaining security roadmaps and improvement plans.

• Work with IT, cloud, infrastructure, and business units to ensure secure design and implementation of systems.
• Provide reporting on infrastructure health, security posture, patch status, and risk findings.
• Support security awareness initiatives and ensure proper security practices are followed throughout the organization.

• Administer identity and privileged account management using Okta, including lifecycle management, MFA enforcement, role-based access, and privileged identity controls.
• Maintain endpoint security policies, access controls, MFA, privileged accounts, and identity governance settings.
• Perform and validate vulnerability scans, system hardening, and remediation of infrastructure weaknesses.
• Ensure network segmentation, zero-trust controls, and secure access principles are implemented across environments.

Required Qualifications

• 7+ years of systems administration experience, including at least 3 years in a senior or lead role.
• Strong hands-on experience administering Microsoft 365, Entra , and Intune in a cloud-first environment.
• Working experience with Azure infrastructure as a service (IaaS), including virtual machines, virtual networks, storage, backup, and role-based access control (RBAC).
• Experience with single sign-on (SSO), federation through Okta or a similar platform, and conditional access design.
• Strong Power Shell scripting skills for automation and bulk administration.
• Experience…