Microsoft 365 Client System Administrator (m/f/d) - Security

The Information Technology department provides all IT services for Berliner Wasserbetriebe and companies in the Berlinwasser Group. Through two modern data centres and innovative communication infrastructure, IT steers the digital future.

What You'll Do With Us

• Administration of M365 tenants (User and Group Security)

• Security in Microsoft 365 (Defender, Advanced Threat Protection, Threat Intelligence, Information Protection)

• Centralised software distribution (e.g. OpenText ZENworks, Microsoft Configuration Manager)

• Administration and troubleshooting of client and server components (e.g. Windows 11, Windows Server)

• Implementation of security strategies and principles or Zero Trust Model

• Second level support in the client environment

What You Bring

• Completed university degree (Master) in IT Security, Business Informatics, or Computer Science with relevant professional experience

• Alternatively: Completed university of applied sciences degree (Bachelor), IT consultant or certified technician in IT Security, Business Informatics, or Computer Science; additionally certified in Microsoft Security, Compliance, and Identity Fundamentals and Microsoft 365 Certified: Endpoint Administrator Associate with relevant professional experience and supplementary knowledge equivalent to a Master's level

• Product-specific training in the administration of client and server operating systems

• Process knowledge (ISO 9001, 20000, 27001, ITIL V4)

• Detailed knowledge of the structure and functioning of Microsoft Azure for Windows client systems and mobile devices

• Identification of threat vectors and data breaches

• Experience in creating and implementing IT security guidelines

• Customer orientation, strong communication and analytical skills, and teamwork ability

Compensation

We offer you a salary in pay group 12 according to the collective agreement for supply companies (TV-V). Depending on personal qualifications, a classification in a lower pay group may be possible.

The position includes on-call duty.

Good Reasons for a Career with Us

• Continuously developed technologies for the Berlin water cycle

• Active research to enhance environmental protection

• Meaningful tasks with responsibility and team spirit

• Diverse career perspectives and support (e.g. Female Leadership Programme, individual development plans, internal training opportunities)

• Work-life balance: 39-hour week, 30 days of annual leave, up to 60% remote work per quarter, various working time models (including full-time or part-time options, sabbaticals, flexitime, 10 extra leave days through salary conversion, etc.), occupational pension scheme (VBL), employee savings schemes (VWL), subsidy for the Deutschlandticket Job, corporate benefits, 39 weeks of continued payment in case of illness, occupational health management (e.g. bike leasing), professional employee advice for all life situations

Application Information

• Individuals with disabilities will be given preference if equally qualified.

• We are particularly interested in applications from women as we strive for equal opportunities and the promotion of women in the workplace.

• Applications from people with migrant backgrounds are explicitly welcome.

• Applications with other educational qualifications will be reviewed on a case-by-case basis and may be recognised in connection with prior knowledge and professional experience.

Your Application

Please apply with your complete application profile (cover letter, CV, certificates, and proof of disability if applicable) by 09.12.2026, quoting the Job ID via our careers page.

Interviews are expected to take place from week 2 onwards.