Information System Security Engineer

Cyber Defense Technologies; Westford (MA); On-site; USD 120,000 - 180,000; Full time

Job summary

Cyber Defense Technologies (CDT) is seeking an experienced ISSE for a DoD program in Westford, MA. This on-site role provides security engineering, systems administration, and information assurance support to the program.

Qualified candidates hold an active Secret clearance (Top Secret preferred) and have hands-on experience with RMF/NIST/NISPOM, VMware, Linux, Windows, HBSS, and network security. Join CDT to contribute to secure, compliant, and resilient enterprise systems.

Qualifications

• 8+ years deploying, configuring, maintaining, and monitoring systems and networks.
• Previous team leadership experience.
• Experience with highly technical solutions and stakeholder reporting.
• Certifications such as CISSP, CCNA, Security+, RHCSA, or similar.

Responsibilities

• System Administration: administer, maintain, upgrade, and ensure readiness of classified systems and technologies.
• Security Testing: perform continuous monitoring and vulnerability testing with ACAS/Nessus.
• Vulnerability Remediation: implement mitigations and patching requirements.
• Networking: maintain and upgrade switching, routing, and firewalls.
• HBSS Maintenance: maintain HBSS installation and upstream connection.
• Documentation & Procedures: create and maintain procedural docs with ISSO team.

Skills

System administration

Security testing

Vulnerability remediation

Networking

HBSS maintenance

Documentation

Ansible automation

PowerShell

VMware vSphere

Windows deployment

Linux (RHEL)

Network engineering

Tools

ACAS/Nessus

Palo Alto

Cisco switches

Windows Server

Red Hat Enterprise Linux

Job description

Overview:

CDT is seeking an experienced and skilled ISSE for a DoD program in Westford, MA. 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:

• Systems Administration: Administer, maintain, upgrade, and ensure the readiness of several classified virtual enterprise systems and corresponding technologies (VMware, Cisco, Palo Alto, Windows Domain, Linux).
• Security Testing: Perform continuous monitoring and systems security testing using tools like ACAS/Nessus.
• Vulnerability Remediation: Implement and provide mitigation solutions for identified findings and patching requirements.
• Networking: Maintain, Troubleshoot, Upgrade Switching, Routing, Firewalls
• HBSS Maintenance: Maintain HBSS installation and ensure upstream connection.
• Documentation & Procedures: Collaborate with the ISSO team 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:

• Software Installations: Perform enterprise software installations and upgrades.
• Compliance: RMF, NIST, and NISPOM requirements, configurations, settings, and documentation.
• Network Engineering: Experience with Enterprise Switching and Firewalls highly desired (For Example: Palo Alto, Cisco ASA, Cisco Firepower, Cisco IOS, Juniper JunOS)
• Linux Skills: Familiarity RedHat Enterprise Linux.
• Ansible or PowerShell automation experience preferred.
• VMware vSphere Experience (ESXi, vCenter, etc.)
• Windows Workstation and Server deployment and administration experience.
• 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.

Why Join Cyber Defense Technologies?

At CDT, we offer a collaborative and inclusive work environment where your expertise in system engineering 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.