Senior Security Engineer – PKI & Detection, Aircraft Security

Location: Fort Worth, Texas (Hybrid – onsite Tuesday through Thursday; remote Monday and Friday)

About the role

We are seeking a Senior Security Engineer to support aircraft security initiatives focused on detection, remediation, and Public Key Infrastructure (PKI). This role will independently design and operate security solutions, investigate security events, develop detections, and drive remediation activities through validated closure. The ideal candidate brings strong hands-on PKI engineering expertise, Microsoft Sentinel detection engineering experience, and the ability to work across technical teams to improve security, reliability, and scalability.

Responsibilities

• Design, build, test, document, and maintain security engineering solutions, scripts, processes, and reusable components in accordance with organizational standards.
• Develop and tune Microsoft Sentinel detections, KQL queries, analytics rules, dashboards, and investigation workflows.
• Conduct end-to-end security event investigations, perform root-cause analysis, and produce clear written documentation of findings and corrective actions.
• Own remediation lifecycle activities, including remediation-plan reviews, vulnerability and finding tracking, and validation of closure.
• Design and operate PKI solutions, including certificate enrollment, authentication, software signing, validation, and supporting key-management processes.
• Partner with security and engineering teams to incorporate security-conscious practices early in the system development lifecycle.
• Identify technical risks related to scalability, latency, durability, and security, and lead practical mitigation strategies.
• Guide junior engineers on technical craftsmanship and contribute to continuous improvement of engineering practices.
• Explore emerging technologies and develop prototypes that may be incorporated into security architecture and operational solutions.

Qualifications

• At least 5 years of security engineering experience with demonstrated independent project ownership; queue-based SOC or triage-only experience is not sufficient.
• Hands-on PKI engineering experience, including PKI solution design and operations, certificate enrollment protocols such as SCEP and EST, Certificate Policy/Certification Practice Statements (CP/CPS), trusted roles, Levels of Assurance, and NIST SP 800-63.
• Strong Microsoft Sentinel experience, including KQL/query development, detection rule authoring, dashboard development, and independently led end-to-end security event investigations.
• Experience owning remediation lifecycle engineering, including remediation-plan review, vulnerability/finding tracking, and validated closure.

Skills

• Experience with AI or agentic security tooling, including LLM-assisted code or configuration analysis and prompt engineering for security use cases.
• Endpoint platform engineering, SSO policy groups, API scripting and automation using Python or PowerShell.
• Experience with aviation, OT, cyber-physical systems, embedded systems, HSMs, key-management, or code-signing infrastructure.

Pay

$60–$65/hour on W2

Benefits

• Medical, dental, and vision coverage
• 401K contributions
• Paid time off and sick leave
• Other benefits mandated by applicable state or localities where you reside or work

About the company

PTR Global is a leading provider of information technology and workforce solutions. With over 5,000 professionals, PTR Global delivers services across the U.S. and Canada. For more information, visit www.ptrglobal.com.