Senior Systems Administrator

Senior Systems Administrator

Requirements

• Bachelors of Science degree with 8 years’ experience. Additional experience will be considered in lieu of degree.
• A Current DoD 8570 baseline certification
• Understanding of the Risk Management Framework (RMF), NIST, ICD, and CNSS standards.
• Familiarity with network technologies (LAN & WAN) and best practices within a classified environment to include crypto and key management
• STIG compliance, SCC and STIG Viewer experience, and ACAS expertise.
• Expert with Microsoft Windows, Linux, and system virtualization in a secure network environment.
• Must be able to work in a constantly changing regulatory environment with short-, mid-, and long-term timelines for remediating any non-compliance
• Must be able to work well within a team environment and able to adapt quickly to change
• Good writing and verbal presentation skills
• Active DoD Secret Clearance

Responsibilities

• Continuous upkeep, monitoring, analysis, and response to Information System, network and security events.
• Implement and maintain Security Technical Implementation Guides (STIGs) across various systems and applications.
• Conduct regular STIG compliance checks using tools like SCAP Compliance Checker and STIG Viewer.
• Document STIG configurations and remediation actions to ensure audit readiness.
• Manage and deploy operating systems and application patches in accordance with federal patch management policies.
• Coordinate patch schedules to minimize operational impact while meeting compliance deadlines.
• Verify patch deployment success and troubleshoot any issues arising from updates.
• Perform regular vulnerability scans using tools such as Nessus, OpenVAS, or similar platforms.
• Administration of Endpoint Detection and Response (EDR) systems, including Trellix
• Analyze scan results, prioritize vulnerabilities based on risk, and develop mitigation strategies.
• Track and report on vulnerability remediation progress to ensure compliance with federal standards.
• Harden systems by applying best practices and federal security guidelines to reduce attack surfaces.
• Maintain configuration baselines and ensure systems adhere to DoD and NIST standards.
• Participates in internal/external security audits/inspections; performs risk assessments and Continuous Monitoring.
• Assist in identifying and responding to security incidents related to vulnerabilities or misconfigurations.
• Document incidents and contribute to after-action reports for continuous improvement.
• Work closely with system administrators, engineering staff, and compliance teams to ensure cohesive security operations.
• Prepare detailed reports and briefings for federal clients on STIG compliance, patching status, and vulnerability management efforts.
• Develop, implement and enforce Information Security Policies and Procedures.
• Leverage tools such as WSUS, SCCM/MECM, or Ansible for patch management.
• Use vulnerability management platforms and ticketing systems to track and resolve issues.

Preferred Qualifications

• Security+ or CISSP or equivalent
• DoD IS knowledge and experience
• Security hardening scripting/automation experience
• Ansible and or MECM experience
• Microsoft OS Certification (MCSE Win 7 or other)
• Linux certification (RHCSA, CompTIA Linux, LCFS/LCFE, etc.)