Information Systems Security Engineer (ISSE) – Sr

DeNOVO Solutions • Aurora, CO

13h • $150,000 - $175,000

About The Position

Lead Cybersecurity Engineering for Mission-Critical Systems as a Senior ISSE! DeNOVO Solutions is seeking a Senior Information Systems Security Engineer (ISSE) to lead security engineering design and validation for hybrid and classified systems. In this role, you’ll define and implement advanced controls aligned to NIST 800-53 and DoD IA frameworks, ensuring systems meet rigorous accreditation and compliance standards. You will provide expert technical guidance during architecture reviews, conduct risk analysis, and mentor engineers across multiple security disciplines. Why You’ll Love This Role: You’ll Lead Security Architecture: Define and validate secure system designs aligned with NIST and DoD frameworks. You’ll Drive Risk Reduction: Conduct penetration testing, security reviews, and mitigation analysis to ensure accreditation readiness. You’ll Mentor and Influence: Provide guidance to engineers and development teams on secure coding and compliance practices.

Requirements

• Expertise in NIST 800-53, CNSSI 1253, and DoD 8500 series control frameworks.
• Proficiency with eMASS, ACAS, Nessus, Tenable.sc, and STIG automation tools.
• Experience with Splunk Enterprise Security and compliance automation platforms.
• Strong background in security risk management and secure systems engineering.
• Experience: 10–15 years of related professional experience supporting programs and contracts of similar scope, type, and complexity.
• Education: Bachelor’s degree in Information Technology or a related discipline (Cybersecurity, Network Administration, Network Engineering, Engineering, or Computer Science). In lieu of a Bachelor’s degree, two additional years of related experience may be substituted. A Master’s degree in a related engineering discipline may be substituted for two years of experience. A PhD in a related engineering discipline may be substituted for an additional two years of experience.
• Certifications : Security+ Required
• Clearance: TS/SCI with Polygraph

Nice To Haves

• CISSP Preferred

Responsibilities

• Lead the development of secure architectures and compliance baselines for hybrid and classified systems.
• Perform penetration testing, risk analysis, and system configuration reviews.
• Advise development teams on secure design and coding best practices.
• Coordinate with ISSMs and Authorizing Officials (AOs) to ensure accreditation and RMF readiness.
• Review RMF packages for accuracy and completeness, mentoring junior engineers on process adherence.

Benefits

• Competitive Wages – This position’s annualized pay range is $150,000 to $175,000.00.
• Medical, Dental, and Vision Premiums 100% Employer Paid for you and your legal dependents or plus up, cost split plan.
• DeNOVO Paid Health Reimbursement Account (HRA)
• 401k with 6% Match
• 11 Paid Federal Holidays
• 120 hours of Paid Time Off (PTO)
• Company Outings and Trips
• Tuition Reimbursement, Skillset Training, and New/Renewed Certification assistance
• HomeFundIt Company Down Payment Match – Employer match towards the down payment of buying a new home

What This Job Offers

• Job Type: Full-time
• Career Level: Senior