Systemadministrator (m/w/d) Infrastruktur & IT-Sicherheit

Advancis Software & Services; Langen; On-site; EUR 55,000 - 75,000; Full time

Benefits offered by this job

Modernes Arbeitsumfeld

Offene Unternehmenskultur

Weiterentwicklung & Wachstum

Betriebliche Gesundheitsvorsorge

Jobrad / ÖPNV-Ticket

Job summary

Advancis Software & Services in Hessen-Langen sucht einen erfahrenen Systemadministrator (m/w/d). Sie betreuen die IT‑Infrastruktur mit Fokus auf Sicherheit und sind verantwortlich für Netzwerkkonzeption, ISMS-Vorbereitung und Risikobewertung.

Sie arbeiten an stabilen, sicheren Systemen, unterstützen ISO/IEC 27001-Management und arbeiten eng mit internationalen Standorten zusammen. GuteDeutschkenntnisse C1 und Englisch B2 sind erforderlich.

Qualifications

• Mehrere Jahre Erfahrung in IT-Systemadministration und IT‑Projekten.
• Gute Kenntnisse hybrider Microsoft 365‑Umgebungen (Entra ID, Exchange Online, Office Suite).
• Fundierte Erfahrung mit Microsoft Windows Server/Clients und Hyper‑V.
• Grundkenntnisse zu Netzwerktechnik, Storage (on‑premises/cloud) und Backup/Recovery.
• Grundkenntnisse von VoIP PBX, Linux inkl. Docker und Anwendungsadministration.

Responsibilities

• Planung und Umsetzung von IT‑Projekten, Schwerpunkt Infrastruktur/Netzwerk.
• Betreuung, Betrieb und stetige Verbesserung der bestehenden IT‑Umgebung.
• Sicherstellung IT‑Sicherheit, inkl. Vulnerability- und Risikomanagement (IAM, Netzsegmentierung, Incident Response).
• Identifikation von Automatisierungspotenzialen im täglichen Betrieb.
• Unterstützung im Tagesgeschäft (Endpunktverwaltung, Mitarbeiter Lifecycle, Support).
• Technische Beratung und Support für Fachbereiche und internationale Standorte.

Skills

Microsoft 365 Umgebung

Windows Server/Clients

Netzwerkgrundlagen

Dokumentation & Audit

Docker (Linux)

Tools

Hyper‑V

Exchange Online

Office 365

ISMS/ISO27001 Kenntnisse

Job description

Job Description

For more than 30 years, Advancis has been developing innovative software solutions for security and building automation. As one of the international market leaders, our solutions are used worldwide in businesses, critical infrastructures, and complex building environments.

For more than 30 years, Advancis has been developing innovative software solutions for security and building automation. As one of the international market leaders, our solutions are used worldwide in businesses, critical infrastructures, and complex building environments.

As a System Administrator (m/f/d), you administer systems with a strong focus on security and take a holistic approach, from network design to selecting the right tools. IT security is an integral part of your mindset, including concepts such as Zero Trust, network segmentation, and SIEM. We are currently building our Information Security Management System (ISMS) and preparing for ISO/IEC 27001 certification. This means that systems are not only operated but are also assessed based on risk and documented in a transparent and traceable manner. Experience with ISO 27001 is an advantage but not a requirement. However, a willingness to think and work within this framework is essential.

Why us?

• Modern and attractive working environment
• Open and dynamic company culture
• Exciting tasks within a highly motivated team
• Diverse career development opportunities, including support for professional and personal growth
• Attractive compensation package with participation in the company's success
• Flexible working hours
• Company health insurance and retirement benefits
• Benefits such as fitness programs, massage, yoga, JobRad bicycle leasing, or public transport ticket
• Centrally located office with excellent public transport connections, as well as ample parking and EV charging facilities
• Regular company events

Your mission

• Planning and implementation of IT projects, particularly in the areas of infrastructure and networking
• Operation, maintenance, and continuous improvement of the existing IT environment
• Ensuring IT security, including vulnerability and risk management (e.g., IAM, network segmentation, incident response)
• Identifying and implementing automation opportunities within daily operations
• Providing support in day‑to‑day IT operations (endpoint management, employee lifecycle processes, user support)
• Technical consulting and support for business departments and international locations

Your profile

• Several years of experience in IT systems administration and the implementation of IT projects
• Very good knowledge of hybrid Microsoft 365 environments (Entra ID, Exchange Online, Office Suite)
• Solid experience with Microsoft Windows Server and client systems, as well as hyperconverged virtualization platforms (Hyper‑V)
• Good knowledge of network architecture, modern networking technologies, storage solutions (on‑premises and cloud), as well as backup and recovery management
• Basic knowledge of VoIP PBX systems, Linux including Docker, and application administration
• Independent, efficient, and structured way of working, combined with excellent communication skills
• Understanding of risk‑based decision‑making, with the ability to balance and justify technical decisions against security requirements, operational feasibility, and cost‑efficiency
• Knowledge of information security management and initial exposure to ISO/IEC 27001, BSI IT‑Grundschutz, or similar frameworks is desirable but not required
• Ability to document complex technical matters in a clear and traceable way, from operational documentation to configuration and change records that stand up to audit requirements
• Fluent German language skills (C1 level) and very good English language skills (B2 level)

About Us

At Advancis, people are at the heart of everything we do. Our success is built on the ideas, expertise and commitment of our employees. That's why we foster a work environment based on trust, teamwork and mutual respect.

We provide the freedom to bring in new ideas, take ownership and grow both professionally and personally. Short decision‑making processes, modern working conditions and an open company culture enable everyone to make a real impact.

We value diversity and welcome applications from all qualified individuals regardless of gender, nationality, ethnic or social background, religion, disability, age, sexual orientation or gender identity. We believe the best ideas emerge when different perspectives come together.

One Advancis. Shaping the future together.