Information System Security Engineer (ISSE) III - NAVSEA

Diligent Consulting Inc; Philadelphia (Philadelphia County); On-site; USD 90,000 - 150,000; Full time

Job summary

Join an innovative firm committed to enhancing national defense through advanced cybersecurity solutions. As an Information Systems Security Engineer, you'll lead the charge in architecting secure systems for the Navy's next-generation technologies. This role is not just about compliance; it's about shaping cyber strategy and ensuring operational strength. You'll collaborate with top professionals in the field, conduct vulnerability assessments, and contribute to critical national projects. If you're passionate about cybersecurity and thrive in a mission-driven environment, this opportunity is perfect for you.

Benefits

Competitive salary

Comprehensive benefits package

Professional growth opportunities

Impact on national defense

Qualifications

• 8+ years of experience in information assurance and cybersecurity engineering.
• IAT Level III Certification required (CISSP, CASP+, or equivalent).

Responsibilities

• Lead complex security engineering tasks throughout the system lifecycle.
• Execute full-spectrum RMF activities, including control tailoring and monitoring.

Skills

Information Assurance

Cybersecurity Engineering

Risk Management Framework (RMF)

Technical Writing

Vulnerability Assessments

DoD Cybersecurity Policies

Education

Bachelor’s degree in Cybersecurity

Master’s degree in Cybersecurity

Tools

ACAS

HBSS

VRAM

SCC

Navy eMASS

Job description

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.

Key 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.

Minimum Qualifications:

• 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

Preferred Qualifications:

• 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

Clearance:

• Active Secret Clearance required

• Top Secret Clearance preferred

Why Join Diligent Consulting:

• Direct impact on national defense and naval readiness

• Cutting-edge cyber engineering work at the system level

• Competitive salary and comprehensive benefits package

• Professional growth in a mission-driven, collaborative environment