# IT System Administrator (m/f/d) with a Focus on Security & Networking - Hybrid at Qcg

> Location unclear · Unspecified · Security · open. Source: https://alderhq.app/jobs/personio%3Aqcg%3A2281676 (read 2026-11-14).

## Facts (observed)

- Company: [Qcg](https://alderhq.app/companies/qcg)
- Location text: Eschweiler
- Where it can be done from (inferred): Location unclear (evidence: "Location: Eschweiler")
- Posted: 2025-08-07 (464 days ago)
- First seen by alder: 2026-11-07 · last verified: 2026-11-08
- Reposted: 0 times · edited: 0 times
- Apply on the employer's site: https://qcg.jobs.personio.de/job/2281676

## Pay and sponsorship

- Posted pay: not posted

## Description (the employer's text)

### Your mission

- Administration, maintenance and optimization of the IT infrastructure with a focus on network security and system stability, particularly within a production environment.
- Operation and continuous development of server and network systems, including firewalls and endpoint security solutions, to ensure a consistently secure IT environment.
- Monitoring and further development of the network infrastructure (LAN/WAN/VPN), including segmentation, access controls and performance optimization.
- Analysis, identification and resolution of security-related vulnerabilities in systems and applications.
- Implementation and maintenance of technical security measures such as patch management, endpoint security, encryption technologies and backup strategies.
- Use of logging, monitoring and SIEM tools to detect and evaluate security-critical events.
- Support in the implementation of new IT projects and technologies with a strong focus on security requirements and network architecture.
- Documentation of IT and security processes as well as creation of policies and guides for users and IT colleagues.
### Your profile

- Completed vocational training or degree in Computer Science, IT Security or a comparable field.
- At least three years of professional experience in IT system administration with a focus on networking and IT security.
- Solid expertise in server and network technologies as well as network security (routing, switching, VLANs, firewalls, VPN).
- Experience with encryption technologies, security concepts and security monitoring tools.
- Experience working with Windows and Linux environments as well as virtualization solutions (e.g. VMware, Hyper-V).
- Independent, structured and security-conscious way of working combined with strong problem-solving skills.
- Very good English communication skills, both written and spoken (C1/C2 level). German language skills are considered an advantage but are not essential for this role.
### Why us?

- A dynamic environment with real opportunities for professional growth, learning and continuous development.
- The possibility to make a direct impact on the company, its IT infrastructure and operational excellence.
- Flat hierarchies, short decision-making processes and an open company culture that values initiative and ownership.

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Data: alder (https://alderhq.app). Cite https://alderhq.app/jobs/personio%3Aqcg%3A2281676 and the date you read it. Observed facts come from the employer's own listing; location reach, level, family and skills are inferences.