IT System Administrator

Company: Express Employment
Location: Aurora
Posted on: February 18, 2026

Job Description:

Job Description Job Description Top Job Located in Aurora, IL Salary: $70,000 to $80,000 A company in Aurora, IL is seeking an IT System Administrator to join their team DIRECT HIRE OPPORTUNITY $70,000 to $80,000 Annual based from experience Role Description The IT System Administrator is responsible for the reliable operation, maintenance, and continuous improvement of the company's IT systems and workplace environment. This includes servers, clients, networks, cloud services, and security components. The role ensures stable, secure, and compliant IT operations in alignment with business needs and regulatory requirements. A key responsibility is ensuring that all administrative activities comply with TISAX AL3 and ISO 27001 standards, including secure configuration, documentation, monitoring, and audit readiness. Core Responsibilities 1. System Operation & Maintenance • Operate and maintain Windows and/or Linux server environments • Manage user accounts, groups, and permissions in Active Directory and related systems • Maintain endpoint environments (Windows clients, mobile devices, printers, peripherals) • Perform regular system updates, patches, and security hardening • Ensure stable operation of workplace applications and productivity tools 2. Security & Compliance • Ensure secure system configurations in alignment with TISAX AL3 and ISO 27001 • Implement and maintain security controls (patching, antivirus, endpoint protection, logging) • Support vulnerability management and remediation activities • Maintain audit-ready documentation for systems, configurations, and changes • Ensure compliance with identity and access management policies (least privilege, SoD, secure authentication) • Support incident response activities and root-cause analysis 3. Network & Connectivity • Support the operation of network infrastructure (LAN, WLAN, VPN, firewalls) • Troubleshoot connectivity issues and ensure reliable network performance • Assist in implementing network security measures and segmentation • Maintain secure remote access solutions 4. Cloud & Modern Workplace • Support cloud services (Microsoft 365, Azure, cloud storage, identity services) • Manage device management platforms (Intune, Autopilot, MDM/MAM) • Ensure secure configuration and compliance of cloud and endpoint systems • Support collaboration tools (Teams, SharePoint, OneDrive) 5. Monitoring, Backup & Recovery • Monitor system performance, availability, and security events • Maintain backup and restore procedures for servers and clients • Support disaster recovery processes and documentation • Ensure data integrity and availability in accordance with compliance requirements 6. Support & Collaboration • Provide 2nd-level support for infrastructure-related incidents and service requests • Collaborate with IT System Engineers, IT Security, IAM, SAP teams, and business departments • Coordinate external service providers and ensure adherence to internal standards • Support internal and external audits with technical documentation and evidence Technical Competencies • Solid knowledge of Windows and/or Linux server administration • Experience with Active Directory, Group Policies, DNS, DHCP • Familiarity with endpoint management tools (Intune, SCCM, MDM) • Understanding of network fundamentals (TCP/IP, routing, firewalls, VPN) • Experience with backup, restore, and monitoring tools • Familiarity with TISAX AL3 and ISO 27001 requirements, including: • Secure configuration and hardening • Logging, monitoring, and auditability • Change and configuration management • Access control and identity management • Backup, recovery, and business continuity Methodological Competencies • Strong analytical and troubleshooting skills • Experience in process documentation and system operation procedures • Understanding of ITIL processes (incident, change, problem management) • Ability to prepare clear technical documentation and service reports Social Competencies • Strong communication and teamwork skills • Ability to collaborate with cross-functional teams (IT, security, business) • Structured, reliable, and solution-oriented working style • High sense of responsibility, confidentiality, and security awareness Areas of Responsibility • Ensure stable, secure, and compliant IT system operations • Implement and document changes in alignment with TISAX AL3 and ISO 27001 • Maintain and optimize server, client, and network environments • Support audits with system-related documentation and evidence • Ensure adherence to internal IT governance and security guidelines • Contribute to continuous improvement of IT operations and processes Role Objectives • High availability, performance, and security of IT systems • Strong compliance with TISAX AL3, ISO 27001, and internal policies • Reduced operational risks through secure configurations and monitoring • Efficient and modern IT workplace environment supporting business needs • Strengthening internal IT administration expertise Please call Express Employment Professionals North Aurora at 630-429-9113 3156 Express Office: North Aurora 1135 Oak Street North Aurora, IL 60542

Keywords: Express Employment, Sioux City , IT System Administrator, IT / Software / Systems , Aurora, Iowa