About this opportunity
Prophecy Technologies lists this System Administrator opportunity in chicago, Illinois. Review the employer’s description below for duties, qualifications and application requirements.
Job description
Senior System Administrator (Prophecy Technologies)
Job Title: Senior System Administrator
Department: IT Infrastructure & Operations
Location: Joliet, IL
PURPOSE
The Senior System Administrator is responsible for architecting, implementing, and maintaining the organization’s enterprise systems and infrastructure to ensure optimal performance, scalability, and security. This role provides leadership across virtualization, systems, and storage management, supporting mission‑critical workloads and driving modernization through automation, observability, and standardization. The Senior System Administrator serves as a senior technical escalation point, mentors junior team members, and ensures adherence to corporate cybersecurity and compliance standards.
Infrastructure & Systems Management
Design, configure, and maintain VMware vSphere, ESXi, and vCenter environments.
Administer Windows Server (2016/2019/2022) and Linux (RHEL, Ubuntu, CentOS) systems, including patching, configuration, and security hardening.
Manage Active Directory, Group Policy, DNS, and DHCP for secure identity and network operations.
Implement and maintain Veeam Backup & Replication for enterprise‑class backup and disaster recovery.
Support enterprise SAN/NAS storage systems , ensuring high availability and lifecycle optimization.
Network & Security
Configure and maintain firewalls, VPNs, and network appliances (Cisco, Fortinet, Palo Alto).
Work with the Cybersecurity team to ensure system patching, endpoint protection, and compliance with DMARC/SPF/DKIM standards.
Monitor system and network performance proactively and perform capacity planning.
Maintain strict system hardening, access control, and audit compliance.
Automation, Monitoring & Reliability
Develop automation scripts using PowerShell, Bash, or Ansible to streamline system operations.
Implement and maintain monitoring and observability tools such as SolarWinds, Dynatrace, Grafana, or Splunk .
Lead root cause analysis and implement preventive and corrective actions for high‑impact incidents.
Participate in continuous improvement initiatives for infrastructure automation and operational resilience.
Serve as Tier‑3 escalation for complex infrastructure and system issues.
Collaborate with IT leadership to define infrastructure strategy, capacity planning, and modernization initiatives .
Mentor junior administrators and ensure operational standards and documentation are maintained.
Participate in on‑call rotation and perform after‑hours maintenance as required.
Seniority Level
Mid‑Senior level
Employment Type
Contract
Job Function
Administrative, Business Development, and Customer Service
Industries
Software Development, Motor Vehicle Manufacturing, and IT Services and IT Consulting
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Worksite address
chicago, IL, 60290, US
Who can apply
Review the original listing for work authorization, qualifications and employer requirements.