System Administrator III with Active DoD SCI clearance

12-month contract for a System Administrator III with Active DoD SCI clearance in St. Louis, MO (5 days/week onsite)

***We can only consider candidates with an Active DoD SCI clearance for this role***

The System Administrator III provides advanced engineering, system integration, and high-level administrative support for secure Closed Area environments. Responsibilities include designing, building, and maintaining enterprise-grade infrastructure - spanning Windows, Linux, virtualization clusters, security controls, and automation pipelines. This role requires independent technical leadership and deep subject matter expertise.

Key Responsibilities

• Research, develop, and implement infrastructure tools and scalable technical solutions
• Lead development of new processes to improve operational and project efficiency
• Maintain update services for applications and infrastructure
• Recommend hardware architecture and enterprise software tools
• Manage and maintain multiple license server implementations
• Create, maintain, and support PKI infrastructure; advise customers on PKI-related solutions
• Build and sustain customer relationships
• Implement and uphold customer standards and industry best practices
• Facilitate problem recreation and deep-level failure analysis
• Present solutions to complex technical issues with consideration for business and operational impacts
• Participate in team meetings, provide technical insights, and support consensus building
• Maintain rapid escalation channels for critical issues
• Maintain hardware infrastructure in secured lab environments
• Install and support complex applications requiring advanced integration
• Create, follow, and review process documentation for accuracy and completeness
• Troubleshoot complex application, system, and integration issues
• Create and maintain Active Directory and VPN/Remote Access accounts
• Deploy, maintain, and troubleshoot mandated secure Group Policy solutions
• Interface with customers, vendors, and SMEs for advanced issue resolution
• Perform system backups and restores

Minimum Qualifications:

• Active DoD SCI clearance required pre-start
• CompTIA Security CE required pre-start
• Minimum 5 years of experience integrating, configuring, and troubleshooting enterprise technologies
• Must support both Windows and Linux enterprise environments, including:
• Extensive Windows Server administration (Server 2019 /Windows 10 )
• Extensive RHEL 8 (RHEL 9 a plus)
• VMware ESXi 7.0 cluster-level engineering experience required, including:
• Cluster configuration
• vCenter management
• Resource pools
• High-availability and DRS policies
• Performance tuning and capacity planning
• Advanced experience with:
• Active Directory administration
• GPO deployment and troubleshooting
• WSUS and SCCM for patching and compliance
• Experience administering:
• PKI infrastructure
• License server implementations
• Ability to lead root-cause analysis and resolve complex technical issues
• Ability to develop new processes and documentation
• Strong customer-facing communication abilities
• Highly self-directed and effective in dynamic environments
• Automation required
• Scripting proficiency required in:
• PowerShell
• Bash
• Python (preferred)

Preferred Qualifications

• Experience with:
• HP AND Dell hardware
• SCAP/STIG compliance and EvaluateSTIG
• Server-based antivirus and data-at-rest encryption
• Nessus vulnerability scanning
• Splunk
• SAN administration
• Networker
• Technical documentation writing/editing
• Ansible, DevOps pipelines, SCCM (advanced usage)
• Microsoft System Center Service Manager (SCSM)