Information Systems Security Engineer; ISSE Security Clearance

Position: Information Systems Security Engineer (ISSE) with Security Clearance
Job Title:

Information Systems Security Engineer (ISSE) Job Category:
Information Technology Time Type:
Full time Minimum Clearance Required to Start: TS/SCI with Polygraph Employee Type:
Regular Percentage of

Travel Required:

Up to 10% Type of Travel:
Local *
*
* The Opportunity:

We are seeking a technically proficient Information Systems Security Engineer to support the security posture of our Network Infrastructure. In this role, you will implement and maintain comprehensive security measures to protect customer data, systems, and networks. This position plays an important role in ensuring security is integrated throughout the system lifecycle, from design through operation, supporting the mission while maintaining strong defensive measures.

Responsibilities:
• Security Architecture Support:
Contribute to the design and documentation of secure system architectures that meet mission requirements and security standards.

• RMF Process Execution:
Support Risk Management Framework (RMF) activities (Steps 1-6), assisting Information System Security Officers (ISSOs) in taking systems from initial categorization through Authorization to Operate (ATO).

• Security Documentation:
Develop and maintain Assessment & Authorization (A&A) documentation, including Systems Security Plans (SSP), Security Control Traceability Matrix (SCTM), and Body of Evidence (BoE).

• Security Engineering:
Designs security architectures from requirements phase, defining system security requirements, and integrating capabilities including Zero Trust Architecture Software Defined Networking (SDN), macro/micro-segmentation, and software-defined perimeter controls to enable continuous verification and minimize network attack surfaces.

• Security Evaluation:
Participate in formal and informal design reviews to identify potential security weaknesses, deficiencies, and/or vulnerabilities in the design - evaluating designs for security impacts before implementation.

• Compliance Implementation:
Ensure hardware and software comply with Government Security Certification Officer (SCO) requirements and align with NIST SP 800-53, ICD 503, and CNSSI 1253 standards.

• Continuous Monitoring:
Implement and maintain continuous monitoring (Con Mon) activities using automated tools to track system health and compliance status.

• Vulnerability Management:
Perform risk assessments and security audits; use tools like Nessus (ACAS) and SCAP to identify, track, and remediate vulnerabilities.

• I ncident Response Support:
Assist with incident response activities and participate in on-call rotation for security incidents.

• Network Integration Support:
Provide support for network mapping activities and system interdependencies to ensure secure data flow across the enterprise.

Qualifications:

Required:

•

Education:

Bachelor's degree in Computer Science, Cybersecurity, Information Technology, or a related field, or equivalent experience.

•

Experience:

10+ years of related work experience with demonstrated ISSE/ISSO responsibilities, preferably within the Intelligence Community or DoD environment.

• Clearance:
Current TS/SCI with Polygraph (Required).

•

Certifications:

Must meet DoD 8570/8140 IASAE Level II requirements (e.g., CISSP, CASP+, or CSSLP).

• Compliance Knowledge:
Working knowledge of NIST 800-53 security controls and experience with RMF processes.

• Technical

Skills:

Understanding of network protocols (TCP/IP, DNS, HTTP) and security concepts including VPNs, IDS/IPS, and DMZ configurations.

• Tooling

Experience:

Experience with A&A tracking tools such as Xacta or eMASS.

• Communication:
Strong analytical, problem-solving, and communication skills with the ability to document technical security findings clearly. Desired:
• Security

Certifications:

CISM, Security+, CCSP, or GSLC.

• Networking

Certifications:

CCNP Enterprise with the SD WAN, CCIE Security, JNCIS-ENT, JNCIP-ENT, or JNCIE-ENT

• Platform

Experience:

Exposure to major firewall platforms (e.g., Palo Alto, Cisco ASA, Fortinet).

• Tools

Experience:

Cisco Identity Services Engine (ISE), Juniper Contrail, Cisco Dev Net, Juniper Automation, or other networking orchestration tool.

• Scripting:
Basic proficiency in Ansible, Python,…