Information System Security Engineer (ISSE) III

Diligent Consulting Inc • Philadelphia, PA

5h

About The Position

Engineer the Cybersecurity Backbone of the Navy's Next-Generation Systems.
Diligent Consulting is seeking Information Systems Security Engineers (ISSE III) to provide advanced cybersecurity and Risk Management Framework (RMF) engineering services to the Naval Surface Warfare Center, Philadelphia Division (NSWCPD). This isn’t a checkbox compliance role—we need engineers who architect secure solutions, shape cyber strategy, and turn NIST controls into operational strength.
If you thrive at the intersection of mission and security architecture, this role is built for you.

Requirements

• Bachelor’s degree in Cybersecurity, Computer Science, Systems Engineering, or related field
• 8+ years of experience in information assurance, cybersecurity engineering, or RMF package development
• IAT Level III Certification required (CISSP, CASP+, or equivalent per DoD 8140.03M)
• Deep experience with: DoD RMF lifecycle (Steps 0–6) NIST SP 800-53 Rev 5, STIGs, and POA&M management Navy eMASS, VRAM, SCC, and cybersecurity reporting workflows
• Active Secret Clearance required

Nice To Haves

• Master’s degree in Cybersecurity or Engineering
• Prior experience supporting Navy or NAVSEA cybersecurity programs
• Strong technical writing skills and experience briefing senior leadership
• Familiarity with DevSecOps and Zero Trust principles
• Top Secret Clearance preferred

Responsibilities

• Lead complex security engineering tasks throughout the system lifecycle: design, development, integration, and sustainment.
• Execute full-spectrum RMF activities (Steps 0–6), including control tailoring, POA&M management, and continuous monitoring.
• Author and maintain RMF documentation: System Security Plans (SSP), Security Assessment Reports (SAR), ISCM strategies, CAPs, and risk assessments.
• Apply guidance from NIST SP 800-53 Rev 5, DoDI 8510.01, and NAVSEA/Navy cybersecurity policies.
• Conduct vulnerability assessments and remediation planning using ACAS, HBSS, VRAM, SCC, and related DoD tools.
• Collaborate with ISSMs, AOs, developers, and system owners to define system boundaries, safeguards, and security architectures.
• Serve as cybersecurity SME during design reviews, connection requests, and mission-critical deployments.
• Analyze risk posture and support risk acceptance decisions with security-first, mission-aware insight.

Benefits

• Competitive salary and comprehensive benefits package
• Professional growth in a mission-driven, collaborative environment

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Number of Employees: 51-100 employees