it security specialist 18916
Jun 29, 2026 · Hemmersbach
About the job
Your skills
Minimum of 4 years' hands-on experience in enterprise network engineering and administration (LAN and WLAN), ideally across a global, multi-site or comparable enterprise environment
Strong, demonstrable experience with HPE/Aruba switching, or a comparable enterprise switching environment, including stacking/IRF, VLANs and L2/L3 routing
Strong, demonstrable experience with HPE Aruba wireless (controllers / Instant / Central), or a comparable enterprise wireless environment
Solid experience with network monitoring and working in an operational / NOC or comparable environment: proactive monitoring, alerting, incident handling and escalation
Deep understanding of network infrastructure, routing, switching and secure network design
Experience with Aruba ClearPass (802.1X, policy and role design, profiling, posture, guest) is a strong advantage; alternatively a solid NAC / 802.1X background and the willingness to take full ownership of ClearPass
Excellent troubleshooting and problem-solving skills, with the ability to work effectively under pressure
Strong interpersonal and communication skills, with excellent English (C1 or higher) — fluency is essential, as English is the working language of the team
Your tasks
As Senior Network Specialist you own our enterprise campus and wireless network (HPE Aruba). The role is hands-on, focused on proactive monitoring and operations in a NOC environment.
Design, configure and operate the enterprise LAN: HPE/Aruba switching with IRF stacking on the core, VLANs and L2/L3 routing
Own the wireless environment end-to-end: HPE Aruba WLAN, including RF planning, coverage and performance
Proactively monitor availability, performance and capacity in a NOC environment: alerting, incident triage and escalation
Operate network access control with Aruba ClearPass: 802.1X, role-based access, profiling, posture and guest/BYOD onboarding
Manage the network lifecycle: firmware/software upgrades, configuration and change management, backups
Troubleshoot connectivity and performance issues, maintain documentation and help enforce secure segmentation
Be part of us
Hemmersbach provides IT infrastructure services in more than 190 countries with 50 own subsidiaries. We deliver exclusively for the leading companies in the IT industry. We go the extra mile – we not only simply enthuse our customers, but also make the world a better place: 20% of our profits go into our Direct Actions Hemmersbach Rhino Force and Hemmersbach Kids’ Family. That’s why Hemmersbach is The Social Purpose IT Company.
Your benefits
Unlimited employment contract
Onboarding program
Buddy program
Mobile working
Health/ Medical insurance
About the company
Hemmersbach provides IT infrastructure services in more than 190 countries with 50 own subsidiaries. We deliver exclusively for the leading companies in the IT industry. We go the extra mile – we not only simply enthuse our customers, but also make the world a better place: 20% of our profits go into our Direct Actions Hemmersbach Rhino Force and Hemmersbach Kids’ Family. That’s why Hemmersbach is The Social Purpose IT Company.
About the company
Hemmersbach provides IT infrastructure services in more than 190 countries with 50 own subsidiaries. We deliver exclusively for the leading companies in the IT industry. We go the extra mile – we not only simply enthuse our customers, but also make the world a better place: 20% of our profits go into our Direct Actions Hemmersbach Rhino Force and Hemmersbach Kids’ Family. That’s why Hemmersbach is The Social Purpose IT Company.