IT Infrastructure Engineer (Windows, Active Directory & VMware)

PSI is a leading Contract Research Organization (CRO) with 30 years of experience in the pharmaceutical industry. Originated in Switzerland, PSI is a privately owned, full-service CRO with a global reach, supporting clinical trials across multiple countries and continents. Our reputation for being highly selective about the projects we undertake highlights our commitment to delivering high-quality, timely services across a broad spectrum of therapeutic indications.

At PSI, we foster an environment where a diverse range of colleagues feel welcomed and valued. Our inclusive culture is a cornerstone of our success, enabling us to attract and retain top talent globally.

We are not just about conducting clinical trials; we are about building a community where every team member has the opportunity to thrive and contribute to groundbreaking advancements in the pharmaceutical industry.

We’re looking for an IT Systems Engineer to join our global Infrastructure & Platform team. In this role, you will design, implement, maintain, and continuously improve infrastructure systems supporting PSI’s business operations globally.

Full-time employment based in Estonia

Key Responsibilities

• Design, implement, maintain, and improve Windows and Linux server infrastructure
• Manage and maintain virtualization, storage, and backup platforms
• Administer Windows Active Directory and Public Key Infrastructure (PKI)
• Support enterprise applications and services hosted on Windows and Linux platforms, including email and business systems
• Manage infrastructure management and supporting systems, including monitoring, patch management, configuration management, and access control services
• Plan and execute OS patching and infrastructure upgrades in accordance with company policies
• Lead small and medium-sized infrastructure projects and participate in larger infrastructure initiatives
• Perform qualification, validation, troubleshooting, and performance optimization of infrastructure systems
• Maintain accurate infrastructure asset inventory, warranties, and related services
• Coordinate with infrastructure vendors, including tracking deliveries, contract execution, and vendor activities
• Develop and maintain technical documentation, procedures, and system standards
• Collaborate with Network & Connectivity and Cloud & Modern Workplace teams on cross-domain

Must-have qualifications

• University degree in IT, Computer Science, or a related field
• Full professional proficiency in English (written and spoken)
• Strong hands-on experience with Windows Server and Active Directory
• Practical experience with virtualization technologies
• Experience with Windows and/or Linux server administration
• Experience with enterprise infrastructure services such as PKI and email/MTA technologies
• Practical experience with backup and disaster recovery solutions
• Experience designing, implementing, and managing infrastructure projects
• Experience with infrastructure monitoring, patch management, and configuration management
• Ability to troubleshoot complex infrastructure issues and maintain detailed technical documentation

Good to have

• Experience with VMware, Proxmox, or Hyper-V
• Experience with Microsoft Azure and hybrid infrastructure
• Experience with Azure Arc and Azure Update Manager
• Experience with Zabbix or other infrastructure monitoring platforms
• Experience with PowerShell or other scripting languages and infrastructure automation
• Experience with Microsoft Exchange, Sendmail, or Postfix
• Experience with Veeam or similar backup technologies
• Familiarity with ITIL, change management, qualification, and validation processes
• Relevant Microsoft, virtualization, Linux, or other infrastructure certifications

If you feel it is time to make your skills and knowledge visible within a growing company with true focus on its people, then PSI is the right choice for you.