Information System Security Engineer (ISSE)

Cyber Defense Technologies; Richardson (TX); On-site; Full time

Benefits offered by this job

Competitive salary based on experience

Comprehensive benefits package

Opportunities for professional development

Job summary

A cybersecurity firm is seeking an experienced ISSE to support a DoD program in Richardson, TX. The role includes hands-on technical responsibilities such as security engineering, administration, and ensuring systems readiness. Candidates should have at least 8 years of experience, relevant technical certifications, and leadership experience. This position offers a competitive salary and a comprehensive benefits package in a collaborative work environment.

Qualifications

• 8+ years of experience in deploying, configuring, maintaining, and monitoring computer systems and networks.
• Previous team leadership experience.
• Experience with implementing highly technical solutions.

Responsibilities

• Administer and maintain classified virtual enterprise systems.
• Provide senior-level security engineering and development support.
• Ensure that proposed system changes do not adversely impact security.

Skills

Security engineering

Systems administration

Information assurance

Network engineering

Automation (Ansible, PowerShell)

Education

CISSP

CCNA

Security +

RHCSA

Tools

VMware vSphere

Cisco Systems

Splunk

Trellix

Job description

Overview:

CDT is seeking an experienced and skilled ISSE for a DoD 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, Top Secret is preferred. 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).
  • Knowledge of Cisco ISE/Forescout CounterACT NAC technologies preferred.
• Perform Site‑Lead/Management duties that support the workflow and project goals for a small team of System Administrators and Information Security Engineers.
• Provide senior‑level 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 local Trellix/ENS installations and upstream connections.
• Work with upstream service providers such as DISA and C5ISR.
• Ensure that authorization/re‑authorization support documentation is developed and maintained in conformance with applicable standards.
• Assist with the client’s progress towards completion of POA&Ms.

Technical Areas of Expertise:

• Performing enterprise software installations and upgrades.
• Enterprise Linux (Red Hat, OEL, Fedora) experience.
• Ansible or PowerShell automation experience preferred.
• VMware vSphere Experience (ESXi, vCenter, etc.)
• Windows Workstation and Server deployment and administration experience.
• RMF, NIST, and NISPOM requirements, configurations, settings, and documentation.
• Network engineering experience highly sought after.

Qualifications:

• 8+ years of experience in deploying, configuring, maintaining, and monitoring computer systems and networks.
• Previous team leadership experience.
• Experience with implementing highly technical solutions and reporting their importance to the organization and stakeholders.
• Technical certifications such as a CISSP, CCNA, Security +, RHCSA, or similar.
• DISA ACAS and Trellix Certifications preferred.

Why Join Cyber Defense Technologies?

At CDT, we offer a collaborative and inclusive work environment where your expertise in finance and HR can help shape the future of cybersecurity and engineering solutions. This position offers the opportunity to lead financial strategies while supporting HR initiatives in a fast‑paced, government contracting environment.

Compensation and Benefits:

• Competitive salary based on experience.
• Comprehensive benefits package, including health, dental, and retirement plans.
• Opportunities for professional development and career advancement.

Apply Now:

If you are a proactive ISSE and thrive in dynamic environments, we encourage you to apply and join the CDT team!

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.