Senior PKI Engineer – TS/SCI Eligible, Trust Architect

99999 Consulting, LLC; Washington (District of Columbia); On-site; USD 180,000 - 235,000; Full time

Job summary

99999 Consulting, LLC is seeking a senior PKI engineer to design and manage trusted PKI infrastructures. You will own certificate lifecycles, policies, and interoperability across diverse platforms, ensuring secure, scalable trust.

Applicants should have 8+ years in PKI/security roles in cleared environments, with TS clearance and professional certification. Expect collaboration with systems and network teams, and mentoring of engineers in best practices.

Qualifications

• 8+ years designing or operating PKI/security systems in secure environments.
• Active TS; ability to obtain TS/SCI.
• Professional certification; expert-level capability preferred.
• Proven ability to design and troubleshoot PKI across multiple platforms.

Responsibilities

• Design and manage PKI architectures, root/intermediate hierarchies, and certificate lifecycles.
• Create segmented trust models and cross-domain trust configurations.
• Generate and support certificates for diverse use cases with vendor constraints.
• Troubleshoot certificate validation across systems and networks.
• Collaborate with cross-functional teams to ensure proper certificate operation.
• Define certificate policies, revocation strategies, and security controls.
• Mentor engineers on PKI fundamentals and best practices.

Skills

PKI design

Security engineering

Certificate management

TLS/SSL

Cross-platform troubleshooting

Education

Security certification

Tools

Microsoft CA

OpenSSL

PKI tooling

Job description

99999 Consulting, LLC is seeking a senior PKI engineer to design and manage trusted PKI infrastructures. You will own certificate lifecycles, policies, and interoperability across diverse platforms, ensuring secure, scalable trust.

Applicants should have 8+ years in PKI/security roles in cleared environments, with TS clearance and professional certification. Expect collaboration with systems and network teams, and mentoring of engineers in best practices.