Systems Administrator SME with Security Clearance
Cornerstone Defense · Herndon, VA · 1 mo ago
Information TechnologyFull-time
Key Responsibilities
- Provide Tier I & II support for enterprise systems and escalate advanced issues as needed.
- Troubleshoot server, operating system, application, and connectivity issues.
- Support daily operations, monitoring, maintenance, and upgrades for on-prem, virtual, and cloud systems.
- Document incidents, problems, and service requests using ServiceNow.
- Support asset management, inventory, and user onboarding activities.
- Maintain system documentation, SOPs, and operational guides.
- Deliver hardware within the WMA; limited travel required.
- Provide guidance and knowledge transfer to junior team members.
Quality Assurance & Testing
- Test and validate system builds, patches, and configuration changes across Dev/Test/Prod environments.
- Conduct functional, integration, regression, and post-deployment tests.
- Create test documentation including Test Plans, Test Cases, Defect Logs, and Test Reports.
- Identify, log, and track defects through closure.
- Create test scenarios that include both expected outcomes and failure conditions.
- Perform smoke testing and pre/post-deployment validation for production releases.
- Identify risks or gaps early in development.
- Recommend areas for automated testing improvements.
Cloud & DevOps Support
- Validate deployments in AWS, Azure, and hybrid cloud environments.
- Verify IAM roles, access controls, and Zero Trust security configurations (ACLs, security groups, routing rules, firewall settings).
- Verify DNS paths, connectivity, and system availability after updates or builds.
- Confirm server build integrity through post-deployment checks (connectivity, logs, performance).
- Ensure systems remain available after certificate updates and patching.