L3 COTS Application Engineer (Windows, Linux and Identity Integration) for NATO with security clearance

L3 COTS Application Engineer (Windows, Linux and Identity Integration) for NATO with security clearance Third-line ownership of the commercial applications an alliance runs on — Atlassian, cloud identity, and the AI tooling now being folded into production. This is the escalation point. When a commercial application that thousands of people depend on stops behaving, it reaches this desk — and it is also this desk that decides how the next one gets deployed, integrated and monitored so it does not. Three positions are open on the same requirement, based at Braine-l'Alleud with half the week on site. The work spans classic third-line application engineering, cloud configuration, and a growing strand of AI tooling going into production. What you would be doing Deploy and manage server applications on Windows and Linux, and integrate them with identity providers. Support the creation and deployment of client applications on end-user workstations. Manage and configure the Atlassian product set. Keep the operational and support environments maintained, and monitor application performance. Gather and report metrics and KPIs, and support in-service operation of the systems. Configure cloud components across Azure and AWS, including identity groups and roles. Deploy, configure and support AI-based solutions, tools and agents, and their integration with the commercial applications in production — then keep them monitored and maintained. Provide second- and third-line support for end-user queries to the agreed service levels, troubleshooting software issues with minimal disruption. Support the local CIS support units and other support staff in daily operations. What we are looking for Real third-line application support experience on both Windows and Linux servers. Atlassian administration and configuration in an enterprise setting. Cloud configuration in Azure and AWS, and identity integration. Working to service levels in a support organisation, and the documentation habits that go with it. An appetite for the AI-integration strand — this part of the role is being built now. Based at Braine-l'Alleud, Belgium, 50% on site, running to the end of December 2026. Department IT Support Locations Braine-l'Alleud Remote status Hybrid Braine-l'Alleud About WLG Work Life Group Sp. z o.o., agencja zatrudnienia (employment agency) KRAZ no. 19578. NIP 7010247728. ul. Nowogrodzka 50/54 lok. 515, 00-695 Warszawa, Poland.