Freelancer profile translated to English.
Back to original languageAbout Romain
Based in Île-de-France — available for hybrid assignments in the Paris region or 100% remote anywhere in France and Europe.
Systems, Networks & Virtualization Engineer, I support companies in thedesign, maintenance, and security of critical infrastructures.
With over 12 years of IT experience, including 4 years as a freelancer, I work on large-scale Windows Server, Linux, and VMware environments, ensuring performance, reliability, and security.
I combine arigorous technicalapproach (run, MCO, automation) with a project vision focused on continuous improvement.
My expertise covers both on-premises environments and the progressive integration of DevOps practices: CI/CD (GitLab), automation (Rundeck, scripts), and infrastructure as code (Ansible, Terraform – notions).
Versatile, autonomous, and passionate, I bring to each assignment a commitment to quality, a global vision of systems, and clear communication between technical and business teams.
French
Native or bilingual
English
Fluent
Can work on-site
Dourdan (up to 40km), Arcueil (up to 10km)
Experience
- Mibu CorpSystems and Virtualization EngineerCONSULTING AND AUDITSNovember 2021 - October 2025 (3 years and 11 months)Paris, FranceAs a freelance systems engineer, I support my clients in thedesign, modernization, and maintenance of infrastructuresthat can be critical.I work on complex, virtualized, and highly available environments, with a constant focus on performance, security, and automation.
Key Missions and Achievements:
- Management and optimization of a VMware infrastructure of over 1100 VMs (VxRail), in Windows and Linux environments.
- Design and deployment of complete technical architectures for major hospital projects (EHR, PACS, Medical AI).
- Automation of recurring tasks via Rundeck and CI/CD integration with GitLab EE.
- Implementation of an administration bastion and segmentation of environments (production / qualification).
- Performance analysis, monitoring (CheckMK), and MCO of critical infrastructures.
- Technical documentation, architecture diagrams, skills transfer to internal teams and service providers.
- Direct collaboration with international editors and service providers (meetings and coordination in English).
Technologies:
VMware vSphere / VxRail, Windows Server 2003–2022, Linux (Debian, RHEL), Active Directory / GPO, CheckMK, Veeam, Rundeck, GitLab CI/CD, MySQL / PostgreSQL / MariaDB, NetApp, Docker, Ansible / Terraform (notions).Added Value:
✅ Expertise in managing large-scale critical environments.✅ Ability to design, document, and automate infrastructures.✅ Pragmatic and results-oriented approach, from run to transformation.✅ Versatility: on-premises infrastructures, CI/CD, and openness to the Cloud. - RATPSystems, Network, and Database AdministratorTRANSPORTATIONMarch 2018 - October 2021 (3 years and 8 months)Jules Vallès, ParisWithin the Local Infrastructure and Steering team, I contributed to thedesign, deployment, and maintenance of systems and infrastructureson a mixed Linux/Windows environment, as well as database administration and steering of cross-functional projects.
Main Achievements:
- Design and implementation of virtualised architectures (VMware): configuration, sizing, and deployment of VMs.
- System and network administration on Linux environments (CentOS – 70%) and Windows Server (2003 to 2019 – 30%).
- Monitoring and MCO of over 150 VMs via Centreon, with performance tracking and optimization implementation.
- Management and maintenance of MySQL, MariaDB, and PostgreSQL databases.
- Administration of the Active Directory infrastructure and network resource management.
- Level 1 to 3 technical support, diagnosis, and resolution of production incidents.
- Technical assistance and consulting (AMOE/A) on industrial and application infrastructure evolution projects: writing specifications, functional scoping, and coordination between business and technical teams.
- Ensuring service quality and IS consistency (backups, NetApp storage, documentation, and technical repository).
Technical Environment:
VMware vSphere, Linux (CentOS, Bash CLI), Windows Server 2003–2019, Active Directory, MySQL / MariaDB / PostgreSQL, Centreon, NetApp, Bash / Powershell scripts, internal ticketing. - RATPLogistics and IT ManagerTRANSPORTATIONAugust 2013 - March 2018 (4 years and 7 months)Massy-PalaiseauAs part of theSupport Polein a railway maintenance workshop, I was responsible for thetechnical, logistical, and human managementof an environment subject to strict regulatory constraints.My role covered the development of internal tools, operational management, and team management.
Main Achievements:
- Design and implementation of an internal logistics application for inventory management and operation tracking.
- Administration and operational maintenance of the Linux technical base supporting business tools.
- Supervision of a team of 16 logistics agents: full HR follow-up (bonuses, development, reviews, training).
- Management of the logistics park (5,000 items): purchasing, inventory, FIFO, quality control, and regulatory compliance.
- Continuous process improvement and updating of the documentation repository.
- Management of the maintenance budget (operational and investment).
- Environmental regulatory monitoring: waste management and legal registers (register 13, BSD, BSDA).
Key Skills:
Team management, industrial maintenance, internal application development, Linux, quality & compliance, budget management, technical documentation.
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Education
- Professional LicenseIUT de Cachan2008
- BTSLycée Léonard de Vinci (Saint Michel sur Orge)2007
Certifications
- Front-End Application DeveloperOrsys2021