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VIVitol

Senior System Administrator(m/w/x)

Genf
Full-timeFreelanceOn-siteSenior

Designing and optimizing hybrid Windows Server and Azure environments for a global energy trader. Several years of enterprise experience with identity and security principles required. Automation with PowerShell, multicultural comfort.

Requirements

  • Several years Senior System Administrator experience in enterprise environment
  • Proven experience with hybrid infrastructures
  • Solid understanding of identity, authentication, encryption, security principles
  • Experience with PowerShell and automation
  • Open-mindedness and comfort in multicultural environment
  • Reliability and trust to support critical systems
  • Flexibility and adaptability to changing priorities
  • Structured and methodical problem-solving approach
  • Strong communication skills in technical and business contexts
  • Team player with professional, service-oriented mindset
  • Microsoft / Azure certifications
  • Experience in regulated environments
  • Familiarity with Swiss data protection and security standards
  • Experience supporting international or multi-site infrastructures

Tasks

  • Design and maintain Windows Server environments
  • Administer and optimize Microsoft Azure infrastructure
  • Manage and support Microsoft 365 and Office 365 services
  • Administer Microsoft Entra ID, including hybrid identity and policies
  • Manage Active Directory, ADFS, DNS, and core identity services
  • Operate and maintain VMware virtualization platforms
  • Administer Microsoft Exchange environments
  • Manage Public Key Infrastructure and certificate authorities
  • Ensure certificate lifecycle management
  • Ensure high availability, backup, disaster recovery, and monitoring
  • Troubleshoot complex infrastructure and authentication issues
  • Apply security best practices for compliance
  • Participate in audits and risk assessments
  • Collaborate with internal IT teams and international stakeholders
  • Maintain clear technical documentation
  • Provide technical leadership and mentoring

Work Experience

  • approx. 4 - 6 years

Education

  • Vocational certificationOR
  • Bachelor's degreeOR
  • Master's degree

Languages

  • EnglishBusiness Fluent
  • FrenchBasic

Tools & Technologies

  • Microsoft Azure
  • Microsoft Entra ID (Azure AD)
  • Microsoft 365 / Office 365
  • Windows Server
  • VMware / Vsphere
  • Active Directory & ADFS
  • DNS, DHCP
  • Microsoft Exchange
  • PKI and certificate management
  • PowerShell
Find the original job posting in its most current version here. Nejo automatically captured this job from the website of Vitol and processed the information on Nejo with the help of AI for you. Despite careful analysis, some information may be incomplete or inaccurate. Please always verify all details in the original posting! Content and copyrights of the original posting belong to the advertising company.

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