Sr Systems Administrator

aqua IT•St. Louis, MO

About The Position

Administer, maintain, and support the application with the customer enterprise. Perform installation, configuration, patching, upgrades, and lifecycle management of Windows and Linux servers. Monitor system health, performance, and availability using enterprise monitoring tools. Troubleshoot complex hardware, software, operating system, and application issues. Support deployment activities across development, test, staging, and production environments. Coordinate scheduled maintenance windows and execute system upgrades with minimal operational impact. Develop and maintain automation scripts using PowerShell, Bash, or Python to improve operational efficiency. Perform backup, recovery, and disaster recovery operations. Support accreditation activities and ensure compliance with customer, DoD, RMF, DISA STIG, and security requirements. Manage user accounts, permissions, and Active Directory integrations. Collaborate with security teams to remediate vulnerabilities and maintain compliance. Support incident response, root cause analysis, and corrective action implementation. Document system configurations, standard operating procedures, and technical documentation. Participate in on-call rotation and provide after-hour support when required. Interface directly with customer to address operational tasking and mission requirements.

Requirements

US citizenship is required per contract with an ACTIVE TS/SCI clearance.
Bachelor’s degree in Information Technology, Computer Science, Engineering, or related field and 8-12 years of prior relevant experience or Master’s with 6-10 years of prior relevant experience.
8+ years of enterprise systems administration experience.
Experience supporting mission-critical DoD or Intelligence Community environments.
Strong administration experience with: Microsoft Windows Server, Red Hat Enterprise Linux (RHEL), VMware vSphere, Active Directory, DNS/DHCP, Group Policy.
Experience with scripting and automation using PowerShell, Bash, or Python.
Experience implementing and maintaining STIG compliance.
Knowledge of RMF security controls and vulnerability remediation.
Strong troubleshooting and analytical skills.
Must have a Security+ CE or higher DoD 8570/8140 certification.

Nice To Haves

Experience supporting customer mission systems.
Experience supporting GEOINT applications.
Experience with: Ansible, VMware vCenter, SCCM/MCM, Splunk, Elastic Stack, Git, ServiceNow.
Red Hat Certified Systems Administrator (RHCSA).
Microsoft Certified: Windows Server Hybrid Administrator Associate.
ITIL Foundation Certification.

Responsibilities

Administer, maintain, and support the application with the customer enterprise.
Perform installation, configuration, patching, upgrades, and lifecycle management of Windows and Linux servers.
Monitor system health, performance, and availability using enterprise monitoring tools.
Troubleshoot complex hardware, software, operating system, and application issues.
Support deployment activities across development, test, staging, and production environments.
Coordinate scheduled maintenance windows and execute system upgrades with minimal operational impact.
Develop and maintain automation scripts using PowerShell, Bash, or Python to improve operational efficiency.
Perform backup, recovery, and disaster recovery operations.
Support accreditation activities and ensure compliance with customer, DoD, RMF, DISA STIG, and security requirements.
Manage user accounts, permissions, and Active Directory integrations.
Collaborate with security teams to remediate vulnerabilities and maintain compliance.
Support incident response, root cause analysis, and corrective action implementation.
Document system configurations, standard operating procedures, and technical documentation.
Participate in on-call rotation and provide after-hour support when required.
Interface directly with customer to address operational tasking and mission requirements.