Information Systems Security Engineer; ISSE) Architect

SAIC is seeking an experienced
Information Systems Security Engineer (ISSE)to support the
MAJESTIC Joint Program Office (JPO)by performing advanced security engineering and architectural design for mission‑critical IT systems.

In this role, the ISSE will lead the
design, development, implementation, and validation of security architectures
, ensuring all security controls are integrated into system engineering processes across the full lifecycle—from requirements development to deployment and sustainment.

The ISSE will collaborate closely with program leadership, system owners, developers, ISSMs/ISSOs, enterprise architects, and cybersecurity operations teams to ensure systems meet federal security requirements, including NIST 800‑53, RMF, and customer‑specificA&A frameworks such as ICD 503 and DAAPM.

This role requires on‑site support
in Springfield, VA
.

• Design and engineer secure system architectures, integrating RMF and mission requirements.
• Translate security requirements into technical specifications, models, and design artifacts.
• Select, implement, and validate security controls and technical mitigations.
• Integrate security into system diagrams, data flows, and high‑/low‑level designs.
• Engineer core security solutions (boundary protection, encryption, IAM, auditing, secure configs).
• Embed security across the full system lifecycle—requirements through sustainment.
• Develop andmaintainA&A documentation and support ATO evidence.
• Test and verify security controls across applications, platforms, and networks.
• Conduct risk assessments, threat modeling, and vulnerability analysis; recommend mitigations.
• Assess security impacts of system changes, upgrades, and new integrations.
• Apply DISA STIGs, CIS Benchmarks, andmaintainhardened configuration baselines.
• Design monitoring architectures for SIEM, detection rules, and audit/log collection.
• Support incident response with architectural forensics and remediation guidance.
• Collaborate with developers, integrators, administrators, and cybersecurity teams.
• Present security engineering findings and architecture recommendations to leadership.
• Produce technical documentation, diagrams, reports, SOPs, and design artifacts.

• High School diploma /GED

• Candidates must satisfy
  Cybersecurity Workforce Framework (CWF)
  ID652(Security Architect,Intermediate Level)or
  633(System Security Engineer,Intermediate Level)requirements, as outlined by Navy COOL.
  This requirement can be met by possessing one or more of the following qualifying certifications:
• Certified Cloud Security Professional (CCSP).
• Certified Information Systems Security Officer (C)
  ISSO-A).
• Certified Secure Software Lifecycle Professional (CSSLP).
• CompTIA Cloud+.
• CompTIASecurityX(formerly CASP+).
• Federal IT Security Professional-Designer-NG (FITSP-D).
• GIAC Cloud Security Automation (GCSA).
• GIAC Continuous Monitoring Certification (GMON).
• GIAC Security Essentials Certification (GSEC).

• 2-5years
  of professional experience managing and supporting enterprise-levelITenvironments.

• Strong understanding of security architecture, secure system design, and engineering principles.
• Experience developing SSPs, security diagrams, interface documentation, and control implementation descriptions.
• Proficiency with vulnerability scanning tools (Nessus, ACAS, Qualys) and technical analysis platforms.
• Knowledge of DISA STIGs, CIS Benchmarks, and secure configuration/hardening standards.
• Familiarity with SIEM platforms (Splunk, Solar Winds) and enterprise monitoring architectures.
• Understanding of Windows Server, Active Directory security, RHEL, and network security concepts (TCP/IP, VLANs, IPsec, firewalls).
• Experience conducting technical risk…