Posted today
Top Secret/SCI
Early Career (2+ yrs experience)
Unspecified
Full Scope Polygraph
IT - Security
Chantilly, VA (On-Site/Office)
Overview: Cyber Defense Technologies (CDT) is currently seeking a skilled System Administrator/ISSE to support, secure, and maintain Linux-based systems in a mission-critical environment. This role blends hands-on system administration with security engineering responsibilities, ensuring systems are reliable, compliant, and resilient against threats. This position will be onsite in Chantilly, VA.
Clearance Requirements: An active Top Secret/SCI with Full Scope Polygraph clearance is required. Applicants who do not meet these requirements will not be considered.
Responsibilities:
• Administer, maintain, and troubleshoot Linux systems (e.g., RHEL, Rocky, Ubuntu)
• Install, configure, and manage servers, services, and applications
• Perform system monitoring, performance tuning, and capacity planning
• Manage user accounts, permissions, and access controls
• Apply patches, updates, and system hardening best practices
• Support backup, recovery, and disaster recovery operations
• Create and maintain system documentation and SOPs
• Implement and maintain security controls in accordance with organizational and regulatory requirements
• Support system accreditation and compliance efforts (e.g., RMF, NIST 800-53, STIGs)
• Conduct vulnerability assessments, remediation, and security hardening
• Analyze system logs and security alerts; respond to incidents as needed
• Collaborate with cybersecurity teams to assess risks and implement mitigations
• Ensure secure configurations across operating systems and services
Required Qualifications:
• 2+ years of experience as a Linux System Administrator or similar role
• Strong experience administering Linux systems in production environments
• Working knowledge of system security principles and best practices
• Experience with system hardening, patch management, and access control
• Ability to troubleshoot complex system and security issues
• Strong documentation and communication skill
Preferred Qualifications:
• Experience as an ISSE or in a security-focused systems role
• Familiarity with security frameworks (NIST, RMF, CIS, or equivalent)
• Familiarity with DISA STIGs and compliance tools (e.g., SCAP, OpenSCAP)
• Scripting experience (Bash, Python, Ansible, etc.)
• Experience with virtualization or containers (VMware, KVM, Docker, Kubernetes)
• Experience with monitoring and logging tools (Splunk, ELK, Prometheus, etc.)
• Security certifications (Security+, CISSP, SSCP, Linux+), or working toward one
Why Join Cyber Defense Technologies?
At CDT, we offer a collaborative and inclusive work environment where your expertise can help shape the future of cybersecurity and engineering solutions.
Compensation and Benefits:
• Competitive salary based on experience.
• Comprehensive benefits package, including health, dental, and retirement plans.
• Opportunities for professional development and career advancement.
CDT is committed to hiring and retaining a diverse workforce. We are an Equal Opportunity employer making decisions without regard to race, color, religion, creed, sex, sexual orientation, gender identity, marital status, national origin, age, veteran status, disability, or any other protected class.
Apply Now:
If you are a proactive System Administration/ ISSE and thrive in dynamic environments, we encourage you to apply and join the CDT team!
Clearance Requirements: An active Top Secret/SCI with Full Scope Polygraph clearance is required. Applicants who do not meet these requirements will not be considered.
Responsibilities:
• Administer, maintain, and troubleshoot Linux systems (e.g., RHEL, Rocky, Ubuntu)
• Install, configure, and manage servers, services, and applications
• Perform system monitoring, performance tuning, and capacity planning
• Manage user accounts, permissions, and access controls
• Apply patches, updates, and system hardening best practices
• Support backup, recovery, and disaster recovery operations
• Create and maintain system documentation and SOPs
• Implement and maintain security controls in accordance with organizational and regulatory requirements
• Support system accreditation and compliance efforts (e.g., RMF, NIST 800-53, STIGs)
• Conduct vulnerability assessments, remediation, and security hardening
• Analyze system logs and security alerts; respond to incidents as needed
• Collaborate with cybersecurity teams to assess risks and implement mitigations
• Ensure secure configurations across operating systems and services
Required Qualifications:
• 2+ years of experience as a Linux System Administrator or similar role
• Strong experience administering Linux systems in production environments
• Working knowledge of system security principles and best practices
• Experience with system hardening, patch management, and access control
• Ability to troubleshoot complex system and security issues
• Strong documentation and communication skill
Preferred Qualifications:
• Experience as an ISSE or in a security-focused systems role
• Familiarity with security frameworks (NIST, RMF, CIS, or equivalent)
• Familiarity with DISA STIGs and compliance tools (e.g., SCAP, OpenSCAP)
• Scripting experience (Bash, Python, Ansible, etc.)
• Experience with virtualization or containers (VMware, KVM, Docker, Kubernetes)
• Experience with monitoring and logging tools (Splunk, ELK, Prometheus, etc.)
• Security certifications (Security+, CISSP, SSCP, Linux+), or working toward one
Why Join Cyber Defense Technologies?
At CDT, we offer a collaborative and inclusive work environment where your expertise can help shape the future of cybersecurity and engineering solutions.
Compensation and Benefits:
• Competitive salary based on experience.
• Comprehensive benefits package, including health, dental, and retirement plans.
• Opportunities for professional development and career advancement.
CDT is committed to hiring and retaining a diverse workforce. We are an Equal Opportunity employer making decisions without regard to race, color, religion, creed, sex, sexual orientation, gender identity, marital status, national origin, age, veteran status, disability, or any other protected class.
Apply Now:
If you are a proactive System Administration/ ISSE and thrive in dynamic environments, we encourage you to apply and join the CDT team!
group id: RTX193694
