Sr. Security Engineer

We are seeking a Senior Security Engineer to lead and advance the security tooling that tests and validates our software against compliance and cybersecurity standards. In this role, you will ensure our toolchain is consistently enforced, highly trustworthy, and continuously enhanced as our products, customer base, and regulatory requirements expand. You will also be a key early contributor as we design and implement our application security and security operations functions.


You will be the technical authority for how security checks are configured, tuned, and enforced across our software development lifecycle (SDLC). You will translate compliance and Risk Management Framework (RMF) requirements into automated, risk-based controls that give engineers fast, actionable feedback early in development. Your expertise in AI-based automation will be key to success. The goal is a pipeline calibrated to the speed of organizational need: secure by default, automated wherever possible, and supported by clear human review when automation flags risk.

On the other end of the SDLC, you will help implement automated and manual pen-testing and other security-related testing capabilities across a range of deployment environments. You will help develop our security operations capabilities with faster and more automated incident response and incident management. Applying an AI-first approach to these functions will enable faster, more efficient, higher-quality outcomes.


This role supports regulated and security-sensitive environments, including systems hosted for Government customers, and partners closely with engineering, product, and cybersecurity leadership.

Core Responsibilities

Own and evolve the security toolchain

• Serve as the technical owner of our pipeline security tooling, including static application security testing (SAST), software composition analysis (SCA), secrets detection, container scanning, and artifact signing
• Assess tooling effectiveness and coverage, identify gaps, and recommend and lead improvements, consolidation, or replacement as needs evolve
• Develop automated and manual pen-testing capabilities with rapid feedback loops into the engineering process.
• Help mature the security operations and incident response capabilities of the company.
• Define the long-term roadmap for security tooling and processes in partnership with Cybersecurity and Engineering leadership

Tune controls to compliance requirements

• Translate National Institute of Standards and Technology (NIST) SP 800-53, NIST SP 800-171, and RMF control requirements into enforceable pipeline gates, thresholds, and policies
• Evolve and maintain risk-based pass/fail criteria that balance security assurance with delivery speed and minimize false positives
• Ensure tooling outputs produce assessor-ready evidence that supports authorizations, continuous monitoring, and audits
• Own the exception and manual-review process for findings that fail automated checks, so decisions are documented and traceable

Enforce integrity and consistency

• Ensure security results cannot be bypassed or tampered with, including enforcement of artifact signing, signature verification before deployment, commit signing, branch protection, and repository rulesets
• Automate the creation and maintenance of software bills of materials (SBOMs) and vulnerability exploitability exchange (VEX) data for delivered software

Drive shift-left adoption

• Move security checks to the earliest practical point (developer workstation, pre-commit, pull request, etc.)
• Partner with engineering teams to embed security into their workflows, supported by clear standards and guidance, so the secure path is the easy path
• Apply artificial intelligence (AI) tooling to accelerate vulnerability triage, remediation, and security automation, and evaluate emerging AI capabilities for the toolchain

Required Qualifications

• 7+ years in DevSecOps, application security, security operations and incident response, and general security engineering, including at least 3 years owning security tooling in continuous integration and continuous delivery (CI/CD) pipelines
• Deep hands-on experience configuring, tuning, and enforcing SAST, SCA, secrets detection, and container scanning tools in production pipelines, including risk-based gates, vulnerability thresholds, and exception processes
• Demonstrated experience mapping security tooling and pipeline controls to NIST SP 800-53, NIST SP 800-171, or RMF requirements, and producing evidence for assessments or authorizations
• Track record of evaluating, selecting, or evolving security tooling, and influencing engineering teams without direct authority
• Scripting or automation experience in Python, Bash, or similar
• Security+ or equivalent Department of Defense (DoD) 8140 qualifying certification, or ability to obtain within 2 months of hire
• U.S. citizen residing and working in the U.S.

Preferred Qualifications

• Familiarity with tools such as GitHub, Argo CD, JFrog, and Snyk
• Experience in DoD software factory or Government DevSecOps environments (for example, Platform One, Iron Bank, or Big Bang)
• Experience supporting Authorization to Operate (ATO) efforts, including control assessment and Plan of Action and Milestones (POA&M) management
• Experience with software supply chain integrity and policy-as-code practices, such as artifact signing, signature verification, SBOMs, Open Policy Agent (OPA), or Kyverno
• Experience applying AI and large language model (LLM) tools to security engineering, such as AI-assisted triage, code review, or remediation
• Experience with penetration testing tools, processes, strategies.
• Familiarity with the cloud and container environments where pipelines run and are deployed (for example, Github, Docker, Kubernetes, and AWS)
• Advanced certifications such as CISSP, SecurityX (CASP+), or GIAC (GSSP, GCSA, or similar)
• Active security clearance (Top Secret highly desired)

About Istari Digital

Istari is a digital engineering software company building open, scalable infrastructure for engineering data. Our platform lets customers simply and securely integrate engineering models across disciplines, organizations, and security levels - whether they're designing prototypes, performing virtual testing, or training AI and autonomy for complex systems.

Focus is rewarded. Finish is remembered.

Facts are friendly. Even when they are not fun.

Fellowship is fundamental. Make others successful.

$135,000 - $220,000 a year

The anticipated compensation range for this position may vary based on experience, skills, qualifications, location, and business needs. In addition to base salary, this role may be eligible for bonuses, equity, and a comprehensive benefits package.

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.