> Markdown version of [/jobs/ext/1309262-senior-public-key-infrastructure-pki-engineer](https://www.wearedevelopers.com/jobs/ext/1309262-senior-public-key-infrastructure-pki-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Public Key Infrastructure (PKI) Engineer - **Company:** ZTI Solutions LLC - **Location:** Fairfax, VA, United States - **Experience:** Expert - **Salary:** $150,000.0 - $190,000.0 - **Contract:** Permanent contract - **Skills:** Microsoft Windows, Active Directory, Application Programming Interfaces (APIs), Amazon Web Services, Microsoft Azure, Bash Shell, Cloud Computing, Cyber Security, Linux, Federal Information Processing Standards (FIPS), Hardware Security Module, Python (Programming Language), Key Management, Windows Servers, Public Key Infrastructure, X.509, Windows PowerShell, Ansible, Zero Trust Network Access, Virtualization Technology, Web Services, SSL Certificate Management, Transport Layer Security, Load Balancing, Istio, HybridCloud, SC Clearance, Kubernetes, Restful APIs, Terraform, Devsecops - **Published:** July 17, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=2fea64f1f701efa5 ## About the Role * U.S. Citizen with an active Secret clearance; eligible for Top Secret (ZTI sponsors processing). * Hybrid: up to 3 days/week onsite in Fairfax, VA. * DoD 8140 IAT Level II certification (Security+ CE or higher), or ability to obtain within 90 days. * 8+ years of systems/security engineering experience with 4+ years focused on enterprise PKI (or 12 years total without a degree). * Experience administering AD CS or comparable enterprise PKI platforms. * Experience automating certificate lifecycle management at scale. * Experience administering Windows Server and/or Linux. * Strong understanding of X.509, CRL/OCSP, enterprise trust models, cryptographic algorithms, and key management. * Excellent analytical, problem-solving, and communication skills., * CISSP, Azure Security Engineer Associate, or AWS Certified Security - Specialty. * Experience with Entrust, DigiCert, EJBCA, Keyfactor, Venafi, or similar platforms. * Hardware Security Module (HSM) experience. * Azure Government, AWS GovCloud, or hybrid cloud environments. * PKI integration with Kubernetes, containers, or service mesh. * Experience supporting DoD RMF, FedRAMP, or CMMC compliance initiatives. ## Description ZTI Solutions is seeking a Senior Public Key Infrastructure (PKI) Engineer to architect, automate, and modernize enterprise PKI supporting Department of Defense and Federal customers. This position focuses on enterprise server PKI, certificate lifecycle automation, and infrastructure trust services, not end-user certificate administration. You will modernize CA infrastructure, automate certificate management at scale, support post-quantum cryptography transition planning, and help shape Zero Trust initiatives in mission-critical DoD environments. ZTI will sponsor Top Secret clearance processing. Benefits include 100% company-paid medical, dental, and vision for you and your family, 4 weeks PTO, and certification reimbursement., * Architect, deploy, administer, and maintain enterprise PKI environments and Certificate Authority (CA) infrastructure, including Microsoft Active Directory Certificate Services (AD CS). * Design and manage enterprise server certificate strategies across Windows, Linux, virtualization, cloud, web services, APIs, and load balancers. * Automate certificate lifecycle management (issuance, renewal, revocation, expiration monitoring, key rotation, reporting) using ACME, SCEP/EST, REST APIs, PowerShell, Python, Bash, Ansible, or Terraform. * Deploy, manage, and troubleshoot TLS/SSL certificates, trust chains, and certificate validation across the enterprise. * Integrate PKI services with Active Directory, Azure, AWS, virtualization platforms, and DevSecOps pipelines. * Support Zero Trust initiatives through machine identity and certificate-based trust. * Support planning for post-quantum cryptography and CNSA 2.0 migration. * Ensure PKI environments comply with NIST, FIPS, DISA STIGs, and RMF requirements. * Participate in incident response for certificate compromise or trust-related events. * Maintain technical documentation, architecture diagrams, SOPs, and configuration baselines. * Provide technical leadership and mentorship to junior engineers. ## Related Videos - [What makes Cybersecurity different for critical infrastructure?](https://www.wearedevelopers.com/videos/571-what-makes-cybersecurity-different-for-critical-infrastructure) - [Docker network without Docker](https://www.wearedevelopers.com/videos/1418-docker-network-without-docker) - [Rate-limiting using eBPF and Istio: How to protect your SaaS customers from themselves](https://www.wearedevelopers.com/videos/100220-rate-limiting-using-ebpf-and-istio-how-to-protect-your-saas-customers-from-themselves) - [Get started with securing your cloud-native Java microservices applications](https://www.wearedevelopers.com/videos/123-get-started-with-securing-your-cloud-native-java-microservices-applications) - [Security Pitfalls for Software Engineers](https://www.wearedevelopers.com/videos/726-security-pitfalls-for-software-engineers) - [Docker exec without Docker](https://www.wearedevelopers.com/videos/1094-docker-exec-without-docker) ## Related Articles - [Dev Digest 134 - Where pixels sing?](https://www.wearedevelopers.com/magazine/477-dev-digest-134-where-pixels-sing) - [Best US AI Conferences for CTOs in 2026: Build vs. Buy, Vendor Evaluation, and Peer Intelligence](https://www.wearedevelopers.com/magazine/736-best-us-ai-conferences-for-ctos-in-2026-build-vs-buy-vendor-evaluation-and-peer-intelligence) - [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers) - [The Overflow: Security and Privacy](https://www.wearedevelopers.com/magazine/715-the-overflow-security-and-privacy) - [The Biggest German Tech Companies](https://www.wearedevelopers.com/magazine/424-the-biggest-german-tech-companies) - [Events like RSAC Get You CISOs. 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