Jean-Sébastien Loiseau

ABOUT

I came to infrastructure the long way. Before IT, I led crews on civil-engineering sites: deep foundations, motorway earthworks, the working platform of an offshore-wind quay in Brest. That work taught me to run operations where mistakes are expensive and downtime is visible to everyone. In 2019 I switched to computer science, and today I'm a research engineer building and operating redundant infrastructure, because running a system end to end is the part of this job I enjoy most. Next stop: high-performance computing.

Université de Reims Champagne-Ardenne Sept 2025 · present · Reims

Research engineer on the France 2030 / ANR project Fo6Med (Lab-I*, ANR-23-CMAS-0008), a hospital information system on physical, redundant infrastructure for training in hospital IT and security.

KEY WORK

• Co-supervise the students building it; validate and correct its network and system architecture.
• Lead restructuring the department's servers onto a Proxmox cluster.
• Configure and maintain Cisco switches/routers and firewalls (Palo Alto, Check Point, Fortinet).
• Co-author a peer-reviewed paper on RemoteLabz (CSEDU 2026).

ProxmoxVMwareCiscoPalo AltoCheck PointFortinetLinux

Université de Strasbourg Work-study · Sept 2024 · Sept 2025 · Strasbourg

KEY WORK

• Finalized an Ansible solution to deploy virtualized OpenStack.
• Integrated Keycloak SSO with user management for OpenStack.
• Built automated usage metrics via Ansible into Grafana (Prometheus / VictoriaMetrics).
• Contributed a merged pull request (#444) to the open-source openstack-exporter.
• Installed H100 GPUs in new HP servers; took part in the architecture discussions on exposing them (PCI passthrough vs vGPU, Nvidia licensing constraints, and why a container platform simplifies GPU operations compared to VM-based passthrough).

OpenStackAnsibleKeycloakGrafanaPrometheusDockerGPU (H100)

Université de Strasbourg Internship · Mar · Jun 2024 · Strasbourg

KEY WORK

• Wrote from scratch the Ansible automation to deploy a virtualized OpenStack, cleanly reinstallable after each test.
• Targeted Proxmox because the production host couldn't PXE-boot.
• Managed resources, troubleshot, documented.

OpenStackAnsibleProxmoxLinux

Université de Reims Internship · Apr · Jul 2023 · Reims

KEY WORK

• Set up FogProject and a dual-boot master image for 100+ workstations (unattend/preseed).
• Migrated a NetBox IPAM from Ubuntu 16 to 22 (PostgreSQL + NetBox upgrades).
• Administered VMs with VMware vSphere/vCenter.
• Built a PHP+SNMP interface to control PDUs.

FogProjectNetBoxVMwarePostgreSQLPHPSNMP

Sefi-Intrafor 2018 · 2019 · Paris region

Deep-foundation works (diaphragm walls); progressed through field roles to leading a crew.

KEY WORK

• Led a crew and ran day-to-day site operations.
• Field roles: batching plant, borehole equipping and rebar cages, drilling-rig support.
• Worked to strict health-and-safety rules (aerial platforms, scissor lifts).

Team leadershipSite operationsCoordinationHealth & safety

Menard France 2018 · Brest

Working platform of the new offshore-wind quay in Brest harbour.

KEY WORK

• Ran the site; managed cement and supply orders and logistics.
• Solved problems under pressure (kept the site running after a generator failure).
• Oversaw an autonomous jet-grouting team; managed platform relocation by jacking.

Site managementLogisticsProblem solving

VINCI Construction Terrassement · A304 2016 · Ardennes

Earthworks: drainage blanket and in-situ soil treatment.

KEY WORK

• Coordinated the crew and the work while machine operators ran the equipment.
• Managed material deliveries and site logistics.
• Worked from construction drawings.

Team leadershipCoordinationLogistics