DHA -EOSS Computer Systems Analyst (Windows/RHEL SA OS)

Quantum Sky; Aurora (CO); In loco; USD 120.000 - 160.000; Tempo pieno

Descrizione del lavoro

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.

Competenze

• 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.

Mansioni

• 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.

Descrizione del lavoro

Description

Quantum Sky is searching for an experienced, high-caliber Senior Computer Systems Analyst(Windows/RHEL SA OS) to support the Defense Health Agency (DHA) E-Commerce Operational Systems Support (EOSS) contract in Aurora, Colorado.

In this mission-critical role, you will serve as the lead Operating System (OS) and Infrastructure Administrator responsible for the health, availability, performance, and cybersecurity posture of all DHA E-Commerce System (ECS) operating systems. The DHA ECS hosting environment resides in the Medical Community of Interest (MedCOI) AWS GovCloud East and comprises an enterprise dual-OS architecture consisting of Red Hat Enterprise Linux (RHEL 7/8) and Microsoft Windows Server (2016/2019/2022).

You will manage and configure operating systems supporting all core DHA ECS applications—including Oracle Federal Financials (OFF R12), the Enterprise Data Warehouse (EDW), PRISM, Management Tracking and Reporting (MTR/PAT), and web/proxy server tiers. You will lead OS upgrades, author custom Amazon Machine Images (AMIs), execute DISA Security Technical Implementation Guides (STIGs), coordinate with DHA Data Center Operations (DCOPS), and administer user and system-level accounts via the Application Virtualization Hosting Environment (AVHE).

Responsibilities:

1. 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.

2. 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.

3. 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 Host Based Security System (HBSS) / Trellix scans, resolving operating system findings prior to production deployment.

• Deploy Information Assurance Vulnerability Alerts (IAVAs), 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 Information System Security Officer (ISSO) and Information System Security Manager (ISSM) in documenting RMF security controls, artifact generation, and annual Authority to Operate (ATO) re-certification activities.

4. Privileged Access Administration & AVHE Virtual Connectivity

• Utilize the DHA DCOPS Application Virtualization Hosting Environment (AVHE) / Virtual Desktop Infrastructure (VDI) as the required secure access path for administrative management of all AWS platforms.

• Act as the designated Point of Contact (POC) for managing system administrator (SA) and standard user accounts; process System Authorization Access Request (SAAR / DD Form 2875) packages and coordinate seed accounts with DHA Consolidated SAAR teams.

• Enforce DoD Public Key Infrastructure (PKI) / Common Access Card (CAC) authentication, Single Sign-On (SSO), and privileged access management policies.

5. Operational Availability, Outage Resolution & Maintenance Windows

• Support the DHA ECS Operational Schedule (PWS Table 2), executing planned OS patching, kernel updates, and server maintenance during designated maintenance windows (Monday–Friday 1800–0600 MT; Saturday–Sunday scheduled windows).

• Respond to unscheduled service disruptions in strict adherence to contract SLAs:

  • Month-End / Year-End / October Cycle: Restore production service disruptions within a maximum allowable downtime of 4 hours.

  • Standard Operations: Restore production outages within 8 hours; non-production (Dev/Test/QA) within 24 hours.

  • Outage Notifications: Notify Government representatives within 30 minutes of a production issue and within 2 hours for lower environments.

• Support biennial CRM System Integration Test (CRMSIT) environment setup, CARS CTDE automation support, IPv6 dual-stack OS configurations, and annual Continuity of Operations (COOP) disaster recovery failover exercises.

Qualifications

Required:

• Citizenship: Must be a United States Citizen (mandatory requirement for DoD background investigation, NACLC T3 clearance, and DHA network access).

• DoD 8140 / 8570 Baseline Certification: Active DoD 8570.01-M / DoD Manual 8140.03 IAT Level II baseline certification (e.g., CompTIA Security+ ce, CCNA-Security, CySA+, GICSP, GSEC