Information System Security Engineer (ISSE)

Cyber Defense Technologies; Richardson (TX); On-site; USD 90,000 - 120,000; Full time

Benefits offered by this job

Health insurance

Retirement plans

Professional development

Job summary

Cyber Defense Technologies (CDT) is seeking an Information System Security Engineer (ISSE) for a DoW program in Richardson, TX. This hands-on, on-site role provides security engineering, systems administration and information assurance support to the program.

An active Secret clearance is required. The selected candidate will work with VMware vSphere, Enterprise Linux, Cisco devices, Palo Alto, Windows Server/Workstation and security tooling like Nessus, Trellix, and Splunk to support

Qualifications

• 3+ years deploying, configuring, maintaining, and monitoring computer systems and networks.
• Technical certifications such as Security+, CISSP, CCNA, RHCSA, or similar

Responsibilities

• Administer, maintain, upgrade, and ensure readiness of classified systems and technologies.
• Provide security engineering and IA support throughout system life cycle.
• Conduct continuous monitoring and security testing with Nessus, ACAS, Trellix, and Splunk.
• Develop and maintain authorization/re-authorization documentation.
• Monitor POA&M progress and ensure policy compliance.
• Support configuration management, continuity, and disaster recovery efforts.

Skills

Security engineering

Network engineering

Windows server/admin

RMF/NIST/NISPOM

Vulnerability assessment

Education

Security+ / CISSP / CCNA / RHCSA or similar

Tools

VMware vSphere

Cisco devices

Palo Alto

Nessus/ACAS

Splunk Enterprise

Job description

Information System Security Engineer (ISSE)

CDT is seeking a skilled ISSE for a DoW program in Richardson, TX. This position is hands‑on technical and will provide on‑site security engineering, systems administration, and information assurance support to the program.

Overview: CDT is seeking a skilled ISSE for a DoW program in Richardson, TX.This position is hands‑on technical and will provide on‑site security engineering, systems administration, and information assurance support to the program.

Clearance Requirements: An active Secret is required. Candidates who do not meet these clearance requirements will not be considered.

Responsibilities

• Experience with administering, maintaining, implementing upgrades, and ensuring the readiness of several classified virtual enterprise systems and corresponding technologies (e.g., VMware vSphere, Enterprise Linux, Cisco Systems (Switch, Router, NGFW), Palo Alto, Windows Server, Windows Workstation).
• Provide security engineering and development support throughout the system life cycle.
• Perform appropriate continuous monitoring and systems security testing using tools such as Nessus Security Center/ACAS, Trellix, and Splunk Enterprise.
• Provide mitigation solutions for identified findings and patching requirements.
• Ensure that proposed system changes are reviewed and that implemented system modifications do not adversely impact the security of the system. (e.g., Change Management)
• Maintain Trellix/ENS installations and upstream connections.
• Ensure that authorization/re‑authorization support documentation is developed and maintained in conformance with applicable standards.
• Monitor the client’s progress towards completion of POA&Ms.
• Ensure that IS users’ activities are monitored and are following security policies and procedures.
• Assist corporate security and program/project staff to create, implement, and maintain procedural documents and operations (configuration management, continuous monitoring, business continuity, disaster recovery, etc.).

Technical Areas of Expertise

• Performing enterprise software installations and upgrades.
• Ansible or PowerShell automation experience not required but preferred.
• Windows Workstation and Server deployment and administration experience.
• RMF, NIST, and NISPOM requirements, configurations, settings, and documentation.
• Network engineering experience highly sought after.

Qualifications

• 3+ years of experience in deploying, configuring, maintaining, and monitoring computer systems and networks.
• Technical certifications such as a Security +, CISSP, CCNA, RHCSA, or similar

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.