Senior Server & PKI Administrator - Windows / Linux

About the Role :

We are seeking a highly experienced and motivated Senior Server & PKI Administrator to join our dynamic team.

In this critical role, you will be responsible for the administration of our Windows, Linux, and Unix server environments, with a strong focus on Public Key Infrastructure (PKI) and automated certificate management.

You will play a key role in designing, implementing, and maintaining secure certificate lifecycles, ensuring the integrity and availability of our critical applications and Administration :

• Administer and maintain Windows, Linux (e.g., Red Hat, Ubuntu, CentOS), and Unix (e.g., Solaris, AIX) server environments.
• Perform system monitoring, performance tuning, and troubleshooting to ensure optimal server health and availability.
• Manage user accounts, permissions, and security configurations across diverse server platforms.
• Implement and maintain server hardening best practices and security policies.
• Perform regular system patching, updates, and & Certificate Management :
• Manage the end-to-end lifecycle of TLS / SSL certificates, including issuance, renewal, revocation, and deployment.
• Work extensively with leading TLS / SSL Certificate Management applications such as Venafi, Sectigo Certificate Manager, DigiCert, and Key Factor.
• Design, develop, and implement automation solutions for automated certificate renewal and provisioning to various network devices, application infrastructure components, and cloud services using APIs (specifically Venafi APIs).
• Integrate automated certificate delivery solutions with Azure Key Vault, AWS Certificate Manager (ACM), and other relevant cloud services.
• Coordinate and act on renewal notifications, manage alerts for high-critical production applications, and ensure timely certificate renewals to prevent outages.
• Possess a deep understanding of Public Key Infrastructure (PKI) principles, including CAs, trust chains, certificate formats (X.509), and cryptographic algorithms.
• Work with Hardware Security Modules (HSMs) for key management and secure certificate & Automation :
• Develop, maintain, and troubleshoot scripts using Bash and PowerShell for server automation, certificate management, and operational tasks.
• Utilize and contribute to CI / CD pipelines with tools such as Terraform, Ansible, and GitHub Actions for infrastructure as code and automated Administration :
• Administer and manage LDAP infrastructure (e.g., Active Directory, OpenLDAP) for user authentication and authorization.
• Troubleshoot LDAP-related issues and ensure seamless integration with various & Documentation :
• Collaborate effectively with cross-functional teams, including security, network, application development, and cloud operations.
• Create and maintain comprehensive documentation for server configurations, PKI processes, automation scripts, and troubleshooting guides.
• Participate in on-call rotation as Skills & Experience :
• 5+ years of demonstrable experience in Server Administration with a strong focus on Windows, Linux, and / or Unix environments.
• 5+ years of experience with TLS / SSL Certificate Management applications such as Venafi, Sectigo Certificate Manager, DigiCert, or Key Factor.
• Proven ability to design and implement automation solutions for automated certificate renewal and provisioning using APIs (e.g., Venafi APIs).
• Working experience with integrations of automated certificate delivery to Azure Key Vault, AWS Certificate Manager (ACM), and various other cloud services.
• Strong proficiency in Bash and PowerShell scripting.
• Experience with scripting and CI / CD tools like Terraform, Ansible, and GitHub Actions.
• Solid understanding and practical experience with Public Key Infrastructure (PKI) concepts and Hardware Security Modules (HSMs).
• Experience with LDAP infrastructure and administration.
• Excellent problem-solving, analytical, and troubleshooting skills.
• Strong communication and interpersonal skills, with the ability to work effectively in a team environment.
• Ability to manage multiple priorities and projects in a fast-paced Skills (Plus Points) :
• Relevant industry certifications (e.g., Microsoft Certified : Azure Administrator Associate, Red Hat Certified Engineer (RHCE), CompTIA Security+).
• Experience with other cloud platforms (e.g., GCP).
• Familiarity with containerization technologies (Docker, Kubernetes).
• Knowledge of network protocols and security best :
• Bachelor's degree in Computer Science, Information Technology, or a related field, or equivalent practical experience

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