System Administrator Security Clearance

Position: System Administrator with Security Clearance
Job Title:

Systems Administrator

Location:

On-site

Clearance Required:

TS/SCI with Full Scope Polygraph Company:
Quantum Science Solutions (QSS) Rate:
Open

Position Overview Quantum Science Solutions (QSS) is seeking an experienced Systems Administrator to provide comprehensive administration, maintenance, and optimization of enterprise IT systems. The selected candidate will manage both physical and virtual environments, implement security measures, and provide operational support across cloud and on premises infrastructures. This role requires expertise in system configuration, cloud service management, security hardening, and technical troubleshooting, as well as the ability to coordinate with multiple teams to ensure reliable, secure, and high-performing systems.

Key Responsibilities
• Manage cloud and on-premises environments, including system builds, maintenance, and upgrades.
• Provide O&M services, system backups/restores, patching, and troubleshooting.
• Configure and administer Linux, Windows OS, Apache, Tomcat, Express servers, MySQL, and Mongo

DB.
• Perform hardware and virtual server installations and configurations.
• Support integration and deployment of applications into production environments.
• Apply system hardening, firewall configuration, PKI certificate management, SSL, and x509 security measures.
• Monitor system performance, alarms, and audit events, and take responsive actions.
• Ensure compliance with patching and version updates for OS, middleware, and application components.
• Manage system access controls and security policies in accordance with Sponsor requirements.
• Develop and implement security procedures for enterprise systems.
• Capture, validate, and manage system requirements, ensuring alignment with project objectives.
• Administer COTS products, low-code/no-code platforms (SharePoint, Service Now, Salesforce), and related application integrations.
• Automate provisioning and configuration of systems using Bash, Terraform, and AWS Cloud Formation.
• Coordinate with cloud service providers, engineering teams, and architecture contractors for service delivery and optimization.
• Maintain documentation for system configurations, security controls, and operational processes.
• Support PMR and monthly reporting requirements related to systems administration. Mandatory Skills & Experience
• Proven experience administering enterprise-level Linux and Windows environments.
• Proficiency with cloud services, automation tools, and scripting.
• Experience in system hardening, firewall configuration, and PKI certificate management.
• Familiarity with Agile delivery, backlog management, and multi-team collaboration.
• Strong troubleshooting skills for both hardware and virtual environments.
• Proficiency with Dev Ops tools (Jenkins, Git Hub) and modern deployment pipelines. Education Requirement
• Bachelor’s degree in Computer Science, Information Technology, or related field.
• Equivalent work experience may be substituted on a year-for-year basis. Preferred Skills
• Experience in cloud environment administration (AWS, Azure, or similar).
• Familiarity with COTS product lifecycle management.
• Strong documentation and configuration management skills. Preferred Certifications
• AWS Certified Sys Ops Administrator – Associate.
• Microsoft Certified:
Windows Server Hybrid Administrator Associate.
• Red Hat Certified System Administrator (RHCSA). Why Join QSS? At QSS, we ensure secure, optimized, and resilient systems that are critical to enterprise operations. As a Systems Administrator, you will have the opportunity to manage high impact infrastructures, implement security best practices, and support mission-focused technology solutions. Employee Benefits
• Competitive Compensation & Performance Bonuses
• Premium Medical, Dental & Vision Insurance
• Generous Paid Time Off (PTO) and Federal Holidays
• 401(k) with Company Matching