Welcome to change Research for a changing society: that is what drives us at Forschungszentrum Jülich. As a member of the Helmholtz Association, we are tackling the major social challenges of our time and researching options for a digitalized society, a climate-friendly energy system and a resource-conserving economy. Work together with around 7,500 colleagues in one of the largest research centers in Europe and shape change with us! As a project management organization, we are a strong partner for science, business and politics. Our specialist area "Information and Communication Technology" (SPF 4), including the specialist group "IT Infrastructure" (SPF 41), supports the business areas relating to IT, information security and data protection issues. Strengthen this area at the earliest possible date as IT System Administrator (f/m/d) Place of work: You are responsible for the implementation, configuration and administration of Windows and Linux servers as well as for the technical and administrative support of user-related hardware and software. You will be responsible for third-level support, system monitoring and the administration of database and proxy systems. You will also design, implement and evaluate measures and system solutions, in particular for hardening the IT infrastructure and ensuring information security in accordance with ISO 27001 on the basis of IT baseline protection. You will also be responsible for creating and regularly updating IT security assessments and concepts. You will support the development of solutions for the use of firewalls and cryptography and contribute to the design and implementation of back-up and disaster recovery concepts. You have a university degree (Bachelor's or Diplom [FH]) in computer science, electrical engineering or information technology or in a comparable field. You have professional experience in server virtualization and server management for Windows and Linux servers You are familiar with VMware vSphere, anti-virus software, Matrix42 and/or Citrix Server as well as SSO (LDAP, ADFS), automation and PowerShell. Ideally, you are familiar with ISO 27001 on the basis of IT-Grundschutz. Specialist knowledge of various project management and quality management methods as well as experience in project management and in the (partial) management of IT projects round off your profile. You are a strong advisor and communicate fluently in German (C2 level) You enjoy working in interdisciplinary teams, also across locations, and you also impress with your reliable and careful way of working. Work-life balance: Various full-time / part-time and home office models are possible with us. Depending on your existing qualifications and depending on the tasks assigned, you will be placed in pay group 11 TVöD-Bund. In addition to the basic salary, there is an annual special payment, a company pension scheme with employer contribution, capital-forming benefits and access to corporate benefits. You can look forward to a comprehensive induction and our wide range of further training opportunities. An equitable, diverse and inclusive working environment in which everyone can realize their potential is important to us. 2025 via our online application portal!