System Administrator

• Lead the management and operations of scalable, secure, and highly available cloud infrastructure supporting the GDSS program
• Oversee cloud operations including monitoring, incident response, troubleshooting, and root cause analysis
• Coordinate with DevOps to develop and implement automation solutions to streamline cloud operations using Infrastructure as Code (IaC) and configuration management tools
• Collaborate with development, security, and engineering teams to ensure seamless integration and operational readiness of cloud applications
• Manage cloud resource provisioning, cost optimization, and capacity planning
• Establish and enforce operational best practices, policies, and standards for cloud environments
• Mentor and provide technical guidance to junior cloud operations engineers
• Participate in on-call rotations and respond to critical incidents to minimize downtime
• Maintain comprehensive documentation of cloud architecture, operational procedures, and incident reports

Cloud Operations System Administrator

• install, administer, and support Red Hat Enterprise Linux, VMware ESXi, HPE infrastructure, and Azure cloud environments
• responsible for system availability, performance tuning, automation, patching, monitoring, security, disaster recovery
• troubleshoot hardware and software issues
• manage capacity and backups
• support change management processes
• document standards
• participate in a 24/7 on-call rotation

Linux Systems Administrator

• Participate as a member of a small team that works cooperatively to ensure system infrastructure and operating systems are available to support applications.
• Analyze, evaluate, plan, implement, configure, patch, upgrade and tune software and hardware in virtualized, highly available, and stand-alone environments.
• Automate manual processes such as patching, updates, server builds, and monitoring.
• Document procedures and update standards for new or modified systems and environments.
• Ability to work in a datacenter environment to provide technical support and asset management.
• Follow Change Management policy and Incident resolution timelines.
• Open and respond to required Change Requests and Work Tickets.
• Respond to systems alerts and be part of a 24/7 rotation for on-call production support.
• Review HPE, Red Hat, and VMware security notifications and deploy updates as necessary.
• Gather, evaluate, and measure data on performance/capacity and report on key measurements.
• Proactively identify problems and provide solutions to management before implementing change.
• Prevent downtime, ensure system availability, monitor performance, manage disk capacity, and ensure system security.
• Design solutions to technical problems and implement new systems or infrastructure changes. Participate in roadmap discussions for future infrastructure improvements.
• Monitor critical systems and take corrective actions prior to failures.
• Prepare for disaster recovery and ensure that appropriate backups are completed and tested.
• Troubleshoot software and hardware failures and work with vendors for support and escalation.
• Establish and maintain security and integrity controls.
• Perform additional duties as assigned.

• Triage and respond to security alerts across Huntress, Blumira, and Microsoft Entra ID, investigating risky sign-ins, anomalous behavior, and policy violations
• Manage and optimize endpoint security tooling, including SentinelOne and other EDR/EPP platforms, ensuring coverage, policy enforcement, and timely response across the device fleet
• Assess and help govern the security implications of AI tool adoption across the organization, evaluating data access, integration permissions, and acceptable use boundaries as new AI initiatives are introduced
• Collaborate with the Platform, Product & Innovation team to ensure security controls and governance frameworks are built into AI and data-driven projects from the outset, rather than retrofitted after deployment
• Investigate security incidents end-to-end and produce clear documentation for technical and leadership audiences
• Audit security configurations against established policies, identify implementation gaps, and surface findings with recommended remediation paths
• Review and validate Conditional Access policies, MFA configurations, and identity hygiene across Microsoft Entra ID
• Conduct vulnerability assessments and coordinate remediation with relevant IT and infrastructure owners
• Perform routine audits of user access, privileged accounts, application permissions, and SaaS integrations
• Support compliance gap analysis against SOC 2, NIST, and CIS Controls frameworks and contribute to the organization's regulatory readiness roadmap
• Evaluate security tools and processes and provide input on improvements that would meaningfully strengthen our posture
• Assist in training junior IT staff on incident identification and response, progressively delegating routine work as their skills develop
• Stay current with the evolving threat landscape, including AI-specific risks, and bring relevant insights back to the team

System Administrator – Contract-to-Hire

• Design, build, and maintain automation solutions that eliminate repetitive manual work across infrastructure, identity, and Microsoft 365 services.
• Develop and manage Infrastructure as Code (IaC) to provision, configure, and govern cloud and on-premises resources in a repeatable, auditable way.
• Build automation and integrations using the Microsoft Graph API to streamline identity, licensing, Teams, Exchange, and SharePoint operations.
• Author and maintain PowerShell scripts and runbooks to automate provisioning, reporting, lifecycle management, and remediation tasks.
• Design, implement, and operate Microsoft cloud solutions including Azure services (compute, networking, storage, monitoring), Entra ID (access controls, roles, MFA, conditional access), and Microsoft 365 (Exchange, Teams, Viva Engage, SharePoint).
• Configure and maintain Windows Server environments across cloud and on-premises, including Active Directory, Group Policy, DNS, DHCP, and IIS.
• Maintain the security, compliance, disaster recovery readiness, and performance of cloud and on-premises services.
• Identify root causes of recurring issues and eliminate them through automation rather than repeated manual resolution.
• Collaborate with cross-functional teams (Security, Application Support, Data, PMO) to deliver scalable and secure solutions.
• Perform other duties as needed.

Systems Administrator Engineer – Cloud, Automation

• Support, implement, and maintain Microsoft solutions for clients
• Work alongside senior engineers and architects
• Gain hands-on experience with Microsoft 365, Azure, Active Directory, security platforms, and endpoint management technologies

• Install, configure, maintain, patch, monitor, troubleshoot, and support Army-approved server operating systems, Windows services, enterprise applications, and related infrastructure.
• Support Active Directory and core enterprise services, including user and computer accounts, security groups, permissions, Group Policy, DNS, DHCP, SMTP, file shares, certificate services, and related account/service request processes.
• Configure, maintain, and troubleshoot virtual, storage, and backup environments, including virtual servers, hosts, clusters, VDI components, NAS/SAN resources, file permissions, replication, recovery, disaster recovery, and continuity support.
• Support SCCM and endpoint administration activities, including software packaging, imaging, operating system deployment, patch deployment, third-party software deployment, client health monitoring, inventory, and reporting.
• Support administration and troubleshooting of desktops, laptops, zero clients, specialized software, peripherals, and other endpoint systems as required.
• Apply, document, and remediate STIG requirements; support vulnerability management, IAVA-related activities, scan result review, patching, security updates, POA&Ms, and compliance documentation.
• Provide technical artifacts and documentation supporting ATO, C&A, cybersecurity audits, SOPs, troubleshooting guides, system configurations, architecture diagrams, and accreditation packages.
• Monitor and resolve system administration trouble tickets, coordinate with service providers and technical teams to resolve issues, and support contingency, emergency, exercise, surge, and after-hours requirements.
• Ensure assigned activities comply with applicable DoD, Army, USTRANSCOM, SDDC, information assurance, cybersecurity, and operational requirements.

System Administrator – Intermediate

• Solve complex problems by bringing together a cross-functional team utilizing the teams skills, knowledge and expertise to engineer the required solution.
• Formulate new value through understanding the integration of seemingly disparate components and communicate these ideas effectively and understandably to engineer the solution.
• Provide technical consultation to determine operations feasibility of current and proposed solutions through analysis, problem definition, and requirements and solutions development.
• Participate on critical and highly visible emergency situations to find solutions.
• Ensure that the infrastructure across multiple applications aligns with the overall enterprise architecture goals to minimize rework and ensure assets are effectively and efficiently utilized.
• Collaborate with Architecture, Engineering, and Operations teams to define plans for standardizing, scaling and enhancing our products and services.
• Collaborate with partner organizations to ensure high quality, adherence to standards and best practices, and scalable processes and deliverables for the purpose of maximizing system and resource availability.
• Develop and incorporate methodologies to transition solutions and/or approaches to Operational Teams.
• Strong understanding of Hubspot functionality, architecture, capabilities and overall best practices, with emphasis on Enterprise Sales Hub and Marketing Hub

System Administrator jobs in Illinois

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Cloud Operations System Administrator

Linux Systems Administrator

Linux Systems Administrator

System Administrator – Contract-to-Hire

Systems Administrator Engineer – Cloud, Automation

System Administrator

System Administrator – Intermediate

HubSpot Systems Administrator