About Us:

Leidos is a leader in IT Cybersecurity industry, dedicated to providing secure and innovative solutions to our global client base. Our engineering team is paramount to our success, ensuring the confidentiality, integrity, and availability of our systems and data. We are looking for a seasoned expert to join our team and take a leading role in shaping our PKI landscape.

Position Overview:

We are seeking a highly skilled and experienced Senior Linux PKI Engineer with experience in Linux and Windows Virtualization platforms to join our dynamic Engineering team. The ideal candidate will be a subject matter expert in Public Key Infrastructure with a strong background in Linux systems. This role is responsible for the design, implementation, and maintenance of our enterprise-wide PKI solutions. You will play a critical role in the security of our digital communications and transactions, ensuring robust and reliable certificate management across our entire infrastructure. This role operates within large-scale, geographically distributed environments supporting high-availability and mission-critical systems.

Key Responsibilities:

• Architect and Design: Lead the design and architecture of a scalable, resilient, and secure PKI infrastructure.
• Implementation and Management: Deploy, configure, and manage all aspects of the PKI environment, including Certificate Authorities (CAs), Registration Authorities (RAs), and Hardware Security Modules (HSMs).
• Automation: Develop and maintain automation scripts (using Python, Bash, or similar) to streamline certificate lifecycle management, including issuance, renewal, and revocation.
• Linux System Administration: Manage and maintain the underlying Linux-based systems hosting the PKI services, ensuring high availability and performance.
• HSM Management: Administer and maintain Hardware Security Modules (HSMs) to ensure the security of cryptographic keys.
• Policy and Governance: Develop, implement, and enforce PKI policies, standards, and procedures.
• Compliance and Accreditation: Support RMF (Risk Management Framework) processes, ensuring PKI systems align with STIG requirements, security controls, and accreditation standards. Assist with auditing activities and provide artifacts/evidence for system authorization.
• Troubleshooting: Serve as the highest level of escalation for complex PKI-related issues.
• Collaboration: Work closely with application, network, and other infrastructure teams to integrate PKI and provide certificate management solutions.
• Mentorship: Provide guidance and mentorship to junior engineers and other team members.
• Stay Current: Keep abreast of the latest PKI technologies, standards, and security threats to continually improve our security posture.

Basic Qualifications:

• Experience: 8+ years of experience in IT with at least 5 years in a dedicated PKI engineering role.
• Education: Bachelor’s degree in Computer Science, Information Security, or a related field, or equivalent work experience.
• PKI Expertise: In-depth knowledge of PKI concepts, including X.509, certificate lifecycle management, CRL, OCSP, and SCEP.
• Linux Proficiency: Extensive hands-on experience with Linux administration (RHEL, CentOS, or similar), including system hardening and performance tuning.
• Scripting Skills: Strong proficiency in at least one scripting language, such as Python, Bash, or Perl, for automation and integration.
• HSM Experience: Proven experience with managing and integrating Hardware Security Modules (e.g., Thales, Entrust, n Cipher).
• PKI Platforms: Hands-on experience with enterprise-grade PKI platforms (e.g., EJBCA, Prime Key, Venafi, or Microsoft CA).
• Networking: Solid understanding of network protocols and security, including TCP/IP, TLS/SSL, and SSH.
• Compliance Frameworks: Experience supporting RMF, STIG implementation, and security compliance in regulated or classified environments, including participation in audits and accreditation processes.
• US citizenship and active DoD Secret clearance required.

Required Certifications:

• Certifications: Red Hat Certified Engineer (RHCE), or VMware Certified Professional (VCP), or An Advanced MS Server level certification.

Preferred Skills:

• Certifications: Professional certifications such as CISSP, RHCE, or specific PKI vendor certifications are highly desirable.
• DevOps: Familiarity with DevOps practices and tools (e.g., Ansible, Puppet, Chef, Terraform).
• Containerization: Experience with container technologies like Docker and Kubernetes.
• Large-Scale Environments: Experience managing PKI in a large, complex, and geographically distributed enterprise environment.
• Enterprise Scale: Experience supporting PKI in large-scale, geographically distributed environments with high-availability and mission-critical requirements.

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.

Original Posting:

April 23, 2026

For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range:

Pay Range $107,900.00 - $195,050.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.