System Administrator (Systems Integration)

Quick Facts

• Role: System Administrator (Systems Integration)

• Focus: End-to-end IT operations, infrastructure, and business application support

• Reporting line: Management

• Work model: On-site; occasional business travel

• Locations: Iserlohn (currently), with move to Dortmund expected from Q4 2027

• Employment: Full-time

• Salary: €60,000–€85,000 per year

Description

You will take responsibility for the company’s IT operating infrastructure and continuously improve it across networks, servers, virtualization, storage, backups, and security. The job includes integrating and reliably running business applications, with SAP Business One as a particularly relevant ERP system. You will also troubleshoot issues, coordinate external support when needed, and plan and deliver IT projects.

Responsibilities

• Administer, monitor, and continuously develop the IT infrastructure

• Plan, build, and operate network and WLAN infrastructure (switching, routing, segmentation, and site networking)

• Administer and develop firewalls, VPN access, and security components

• Operate, maintain, and document server and storage systems, including virtualization and backup environments

• Install, configure, maintain, and replace hardware, workstations, mobile devices, and peripherals

• Administer operating systems, user accounts, permissions, and central services

• Support and integrate enterprise applications, especially ERP (SAP Business One)

• Analyze and resolve incidents in internal support; coordinate external service providers when required

• Plan and implement IT projects (e.g., infrastructure modernization, system migrations, new software rollouts)

• Develop and maintain IT documentation, emergency concepts, backup strategies, and operating standards

• Support implementation and development of IT security and data protection requirements

• Work closely with business departments (production, quality assurance, logistics, administration, and management)

Requirements

• Completed IT training (e.g., IT specialist for system integration) or equivalent qualification

• At least 3 years of system administration experience

• Practical experience administering and operating heterogeneous IT infrastructures

• Strong knowledge of networks, routers, firewalls, WLAN, servers, virtualization, NAS systems, backups, and IT security

• Experience administering Windows and Linux environments plus common network/directory services

• Understanding of ERP and business application integration and operations; SAP Business One knowledge is especially desirable

• Solid experience with hardware, clients, and peripherals, and structured troubleshooting skills

• Advantage: experience planning and implementing IT projects

• Willingness to learn new systems/technologies and take responsibility for stable operations

• Good German communication skills and sufficient English for technical documentation and vendor exchange

• Independent, careful, and service-oriented working style

Benefits

• Company pension plan

• Company events

• Company bike and mobile phone

• Flexible working hours

• Home office option

• Free drinks and parking

• Employee discounts

• Employer-paid savings benefits (vermögenswirksame Leistungen)

• Training and further education programs

• Additional vacation days