Job
- Level
- Senior
- Job Field
- IT, Network, System
- Employment Type
- Full Time
- Contract Type
- Permanent employment
- Location
- Cologne
- Working Model
- Hybrid, Onsite
Job Summary
In this role, you manage our Linux server landscape, handle virtualization with Proxmox, configure firewalls and VPNs, analyze disruptions, and further develop automation processes.
Job Technologies
Your role in the team
- As part of our IT team, you will play a central role in the operation and further development of our infrastructure.
- You don't think in tickets, but in solutions, take responsibility, and drive topics forward independently.
- Support, optimization, and further development of our Linux-based server infrastructure.
- Operation and expansion of our virtualization environment based on Proxmox.
- Administration and further development of hybrid infrastructures (on-premise and cloud).
- Configuration and operation of our firewall infrastructure, especially pfSense.
- Establishment and maintenance of VPN connections between locations, data centers, and cloud systems.
- Monitoring of servers, networks, and services as well as proactive fault analysis.
- Analysis and troubleshooting of issues in ongoing operations.
- Further development of automation, standardization, and documentation processes.
- Technical assessment of new requirements and derivation of sustainable infrastructure decisions.
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Our expectations of you
Qualifications
- Excellent knowledge of Linux administration.
- Solid understanding of networks (Routing, VLANs, DNS, DHCP, VPN, Firewalling).
- Experience in operating hybrid infrastructures (On-Premise and Cloud).
- Basic knowledge of automation and scripting (e.g., Bash, Python, Ansible).
- A structured, self-reliant, and solution-oriented way of working.
- Confident demeanor and the ability to communicate technical decisions clearly.
- Knowledge of high availability, storage, or cluster environments.
- Knowledge in IT security, hardening, and access concepts.
Experience
- Several years of professional experience as an IT administrator, system engineer, or in a comparable role.
- Experience with virtualization, ideally Proxmox.
- Experience with pfSense or comparable firewall solutions.
- Experience with monitoring tools such as Prometheus, Grafana, Zabbix, Checkmk, or Icinga.
- Experience with backup and disaster recovery concepts.
- Experience with container technologies such as LXC or Docker.
- Experience with cloud platforms (e.g., AWS, Azure, Hetzner).
- Experience with documentation and structured change management.
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What we offer
- Flexible working hours and hybrid working.
- A modern, versatile IT infrastructure with room for creativity.
- Independent work and genuine technical ownership.
- Flat hierarchies and quick decision-making processes.
- A team that works pragmatically and supports each other.
- Direct influence on architecture and infrastructure decisions.
- Individual training and development opportunities.
- Regular professional exchange and space for new ideas.
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Benefits
Work-Life-Integration
Health, Fitness & Fun
Topics that you deal with on the job
Job Locations
This is your employer
Intelligent Research in Sponsoring GmbH
Intelligent Research in Sponsoring GmbH (IRIS) is an established company based in Karlsruhe and Cologne, specializing in market research and sponsorship analysis in the sports sector. It supports sports organizations and sponsors through data-driven analyses for evaluating sponsorship investments and media presence.
Description
- Company Type
- Established Company
- Working Model
- Hybrid, Onsite
- Industry
- Sports, Leisure
Senior IT Administrator / Senior System Engineer
- Location
- Cologne
- Working Model
- Hybrid, Onsite
- Diversity
- Open for all genders
