Infrastructure security & system engineering

Infrastructure Security & System Engineering


Infrastructure Security & System Engineering

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About Unilabs

Headquartered in Geneva and part of the A.P. Moller Group, Unilabs is a leading European diagnostic services provider, that aspires to be at the heart and start of all effective treatment decisions.

About Unilabs

Headquartered in Geneva and part of the A.P. Moller Group, Unilabs is a leading European diagnostic services provider, that aspires to be at the heart and start of all effective treatment decisions.

With operations in 14 countries, Unilabs is positioned as a leading diagnostics company with one of the broadest geographic coverages in Europe.

Unilabs possesses the most comprehensive portfolio of diagnostic services in Europe, serving: public and private healthcare providers, county councils, the general public, insurance companies, the pharmaceutical industry and Contract Research Organizations.

About The Role

We are looking for a Senior System Engineer with a strong focus on cybersecurity to lead the protection and resilience of our hybrid IT infrastructure. The ideal candidate will be an experienced professional who can secure and manage on-premises Windows and Linux servers, protect enterprise databases, and oversee the deployment and management of cloud-based security platforms, including Microsoft Defender for Endpoint, Microsoft Sentinel, and Zscaler.

Key Responsibilities:


Infrastructure Security & System Engineering


* Design, implement, and maintain secure system configurations across Windows Server and Linux Server environments
* Lead the hardening, patching, and continuous monitoring of critical on-prem infrastructure
* Enforce least-privilege access, auditing, and secure remote access across all systems


Cloud Security Architecture

* Lead the deployment, configuration, and tuning of:
o Microsoft Defender for Endpoint across servers and endpoints
o Microsoft Sentinel for threat detection, hunting, and automated response
o Zscaler solutions (ZIA/ZPA) to secure user and application traffic
* Integrate on-premise systems with cloud-based security tools for centralized visibility and control

Database Security Oversight

* Define and enforce security controls across SQL and NoSQL databases (access, encryption, logging)
* Collaborate with DBAs to ensure data-at-rest and in-transit protections are in place and compliant


Incident Response & Threat Hunting

* Lead investigations into complex security incidents; provide technical guidance during containment, eradication, and recovery phases
* Perform proactive threat hunting using Sentinel and threat intelligence feeds
* Conduct root cause analysis and implement long-term mitigation strategies


Governance, Risk & Compliance

* Develop and maintain security documentation, architecture diagrams, and system baselines
* Support internal and external audits (ISO 27001, GDPR, etc.) by providing technical evidence and guidance
* Ensure compliance with security policies, regulatory requirements, and best practices


Leadership & Mentoring

* Act as a subject matter expert for infrastructure and cloud security topics
* Mentor junior engineers and contribute to internal training programs
* Influence enterprise security strategy and participate in technology planning initiatives


Requirements

* Technical Skills & Experience:
o 5+ years of experience in system engineering or cybersecurity roles
o Advanced knowledge of:
+ Windows Server (Active Directory, GPOs, PowerShell, WSUS)
+ Linux systems (Ubuntu, CentOS, systemd, SELinux, SSH, auditing)
+ Microsoft Defender for Endpoint, Microsoft Sentinel, Zscaler (ZIA/ZPA)
+ Security architecture for on-prem and hybrid cloud environments
o Strong understanding of:
+ TCP/IP networking, firewalls, VPNs, proxy solutions
+ Security Information and Event Management (SIEM)
+ Endpoint Detection and Response (EDR)
+ Vulnerability management and remediation processes
* Certifications (preferred but not required):
o Microsoft Certified: Cybersecurity Architect Expert / Azure Security Engineer (AZ-500)
o Zscaler Certified Cloud Professional (ZCCP)
o CompTIA Security+, CySA+, or CASP+
o Red Hat Certified Engineer (RHCE) or Linux+
o (ISC)² CISSP or equivalent advanced certifications
* Soft Skills:
o Strategic thinker with strong analytical skills and attention to detail
o Clear and confident communicator with both technical and non-technical stakeholders
o Strong leadership, time management, and decision-making capabilities


Seniority level

* Seniority level

Mid-Senior level


Employment type

* Employment type

Full-time


Job function

* Job function

Information Technology
* Industries

Non-profit Organizations and Primary and Secondary Education

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