Information System Security Engineer III

Join ClearPoint and become part of a team focused on delivering secure environments that support mission-critical work for government and defense organizations. ClearPoint specializes in designing, building, and managing secure facilities and controlled environments that enable partners across the Defense Industrial Base to operate in highly regulated settings.   As part of the ClearSpectrum LLC family of companies, ClearPoint combines enterprise resources with small-business agility to deliver secure infrastructure solutions. Our team supports the development of secure collaboration spaces, classified environments, and mission-enabling facilities that help customers execute critical national security missions. Your Mission:

Join ClearPoint as an Information System Security Engineer III, where you will lead the security engineering and accreditation work behind MERIDIAN, our AI-Enabled Secure Space Operations & Management Platform. You will work closely with internal and external stakeholders to build security into the system throughout its lifecycle, reviewing architecture, testing the system as it's built, and shaping controls alongside engineers concurrently with development and implementation.

You will own the RMF package for MERIDIAN's implementation, from SSP and SAR development through POA&M management and continuous monitoring, while staying technically engaged with the platform as it evolves.

You Will Excel in This Role If You Are:

Experienced leading RMF/ATO efforts for classified DoD or IC systems

Comfortable reviewing and shaping secure system architecture alongside engineers, not just documenting it after the fact

Skilled in vulnerability assessment and security testing of live systems

Familiar with NIST SP 800-53 and DoD RMF processes at an implementation level

Capable of translating security findings into concrete, actionable remediation guidance

Comfortable balancing compliance documentation with ongoing hands-on technical engagement

Experienced mentoring less experienced security staff

A Day in the Life:

Develop and maintain SSP, SAR, and POA&M documentation for RMF accreditation

Review system architecture and provide security guidance to engineers during design and development

Conduct vulnerability scans and security assessments of the system as it's built

Identify security weaknesses and recommend system-level remediation

Implement and manage security controls, including identity/RBAC, audit logging, and encryption

Track and drive remediation of findings identified during security assessment

Mentor junior security staff and provide technical guidance

What We Are Expecting From You:

Active TS/SCI with Polygraph clearance; U.S. citizenship

Bachelor's degree in Computer Science, Software Engineering, or related field (4 years of experience may substitute), plus 8 years of experience in information systems

5–8 years of experience as an ISSE or Cybersecurity Engineer

Proficiency with networking, firewalls, and security monitoring tools

Knowledge of operating systems, system security design, risk analysis, and security policies

Experience with NIST Risk Management Framework (RMF) or DoD 8500 series compliance

Experience reviewing and shaping secure system architecture alongside development teams

Experience conducting vulnerability assessments and security testing

Nice to Have:

Experience embedding security into CI/CD pipelines and DevSecOps workflows

Familiarity with container and cloud security tooling

Experience with automated security scanning (SAST/DAST) as part of the development lifecycle

Experience with cryptography, encryption technologies, and application security

Experience with penetration testing

Experience with physical security or facility accreditation practices, such as ICD 705 or similar frameworks

ClearPoint is committed to delivering secure, compliant environments that enable our partners to operate effectively in mission-critical settings. We value a culture of collaboration, accountability, and operational excellence while empowering our employees with opportunities to grow and contribute to meaningful work.   Our Core Values—Honesty, Integrity, Loyalty, Fairness, Respect, Responsibility, and Accountability—guide how we operate and how we support our customers and partners. If this position is not the right fit, we encourage you to explore additional opportunities across the ClearSpectrum family of companies or reach out to our recruiting team at careers@clearedgeit.com. ClearPoint is an equal opportunity employer.