Senior Systems Analyst – Windows/Linux & Cloud Security

Quantum Sky; Aurora (CO); On-site; USD 120,000 - 160,000; Full time

Job summary

Quantum Sky in Aurora, CO seeks a Senior Computer Systems Analyst to serve as lead OS and infrastructure administrator for the DHA EOSS contract. You will manage RHEL and Windows Server environments, ensure security posture, and support Oracle OFF R12, EDW, PRISM, MTR/PAT, and web tiers.

The role requires DoD background and IAT Level II certification, STIG implementation, and close coordination with DCOPS to maintain ATO posture and incident response within DoD timelines.

Qualifications

• Citizenship: United States Citizen is mandatory for DoD access.
• Active DoD 8570.01-M / DoD 8140.03 IAT Level II baseline certification (e.g., Security+, CCNA-Security, CySA+, GICSP, GSEC) is required.

Responsibilities

• Operating System Administration & Maintenance: Serve as the Senior System Administrator maintaining full lifecycle responsibility for all RHEL and Windows Server operating system instances across Development, Test, Quality Assurance (Pre-Prod), and Production environments.
• Lead the deployment, configuration, and migration of operating systems across major technology baselines (e.g., upgrading Windows Server 2016/2018 to Windows Server 2022, and RHEL 7 to RHEL 8/9) ensuring uninterrupted application performance.
• Administer OS-level executive software, server utilities, server roles and features, Active Directory services, and Group Policy Objects (GPOs) to maintain system consistency and policy enforcement.
• Monitor system resource utilization, memory, processor capacity, storage, and I/O performance; conduct sizing and capacity planning in coordination with DHA DCOPS.
• Cloud Infrastructure & AWS AMI Management: Utilize the AWS Management Console to manage and monitor virtual server instances within the MedCOI AWS GovCloud East environment.
• Build, maintain, and harden custom DHA ECS Amazon Machine Images (AMIs) and deployment templates for distribution to the DCOPS Onboarding Team for rapid server provisioning.
• Coordinate onboarding forms, Change Requests (CRQs), Support Tickets, and Application Service Interruptions (ASIs) through the DHA Global Service Center (GSC) ticketing system for infrastructure modifications.
• Ensure strict segregation of environments: ensure developer access is restricted to Development and Test, while maintaining the production-equivalent ATO posture of the QA/Pre-Prod and Production environments.
• Cybersecurity Hardening, STIG Implementation & Vulnerability Remediation: Apply DISA Security Technical Implementation Guides (STIGs) and maintain STIG checklists across all Windows Server and RHEL operating systems.
• Continuously review and remediate vulnerabilities identified by the Assured Compliance Assessment Solution (ACAS) and HBSS / Trellix scans, resolving operating system findings prior to production deployment.
• Deploy IAVA patches, security patches, hotfixes, and vendor service packs within mandated DoD timelines, eliminating the need for unapproved Plans of Action and Milestones (POA&Ms).
• Support the ISSO/ISSM in RMF controls documentation, artifact generation, and annual ATO re-certification activities.
• Privileged Access Administration & AVHE Virtual Connectivity: Utilize the DHA DCOPS AVHE/VDI as the secure access path for administrative management of all AWS platforms.
• Act as POC for SAAR/DD Form 2875 packages and seed accounts coordination with DHA Consolidated SAAR teams.
• Enforce DoD PKI/CAC, SSO, and privileged access management policies.
• Operational Availability, Outage Resolution & Maintenance Windows: Support the DHA ECS Operational Schedule, perform planned OS patching, kernel updates, and maintenance within designated windows.
• Respond to service disruptions per SLAs: restore production within 4–8 hours depending on the scenario; notify Government representatives per protocol.
• Support CRM environment setup and DR/COOP exercises.

Job description

Quantum Sky in Aurora, CO seeks a Senior Computer Systems Analyst to serve as lead OS and infrastructure administrator for the DHA EOSS contract. You will manage RHEL and Windows Server environments, ensure security posture, and support Oracle OFF R12, EDW, PRISM, MTR/PAT, and web tiers.

The role requires DoD background and IAT Level II certification, STIG implementation, and close coordination with DCOPS to maintain ATO posture and incident response within DoD timelines.