Senior Systems Administrator
Senior Systems Administrator
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$ 89700 - 162150
1 Vacancy
Job Description
Leidos is seeking a skilled Senior Systems Administrator in Fort Belvoir VA to join the I3TS team supporting DTRA. The I3TS program provides enterprisewide IT support to enable DTRAs Information Management & Technology Directorate (ITD) to consolidate modernize and continuously innovate the delivery of IT services and mission capabilities to DTRAs internal and external mission partners operating in CONUS and OCONUS locations. The candidate will be responsible for ensuring the security and integrity of IT systems by applying Security Technical Implementation Guides (STIGs) managing system patches and overseeing vulnerability management processes. This role supports federal clients in maintaining compliance with the Department of Defense (DoD) and other federal cybersecurity standards.
The candidate will be responsible for identifying points of vulnerability noncompliance with established Information Assurance (IA) guidelines and regulations and recommend mitigation strategies along with assisting users as needed in a classified computing environment. The selected candidate must be able to work independently as well as with a team of IT analysts administrators and engineers. The position requires excellent communications skills both verbal and written. The candidate must be able to work in a highenergy environment and adapt to shifting priorities
Key Responsibilities:
Continuous upkeep monitoring analysis and response to Information System network and security events.
STIG Application and Compliance:
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.
Patching and System Updates:
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.
Vulnerability Management:
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.
System Hardening:
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.
Incident Response Support:
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 afteraction reports for continuous improvement.
Collaboration and Reporting:
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.
Tool Utilization:
Leverage tools such as WSUS SCCM/MECM or Ansible for patch management.
Use vulnerability management platforms and ticketing systems to track and resolve issues.
Basic Qualifications:
BS bachelors degree with 68 years experience or 10 years of IA experience without a 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 longterm timelines for remediating any noncompliance
Must be able to work well within a team environment and able to adapt quickly to change
Good writing and verbal presentation skills
Must possess an active DoD Secret with eligibility for a Top Secret at time of consideration.
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.)
Original Posting:
May 8 2025For U.S. Positions: While subject to change based on business needs Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.
Pay Range:
Pay Range $89700.00 $162150.00The Leidos pay range for this job level is a general guideline onlyand not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job education experience knowledge skills and abilities as well as internal equity alignment with market data applicable bargaining agreement (if any) or other law.
Required Experience:
Senior IC
Employment Type
Full-Time
