Freelancer profile translated to English.
Back to original languageAbout Guillaume
Passionate about security and the integration of systems and network solutions, I have mainly worked with SMEs and large groups.
I am proficient in the administration of GNU/Linux and Windows servers.
Having been in charge of an IaaS/PaaS Private Cloud solution, I have an advanced understanding of cost management and optimization, as well as operational and security maintenance.
I have also prepared the implementation of critical infrastructures involving SCADA systems or post-incident recovery.
In addition, I have contributed to projects for the implementation of Public Cloud architectures.
French
Native or bilingual
English
Fluent
Can work on-site
Paris (up to 20km)
Experience
- RhoNETManager / Systems, Networks & Security ArchitectOctober 2024 - Today (1 year and 8 months)Paris, France● Hosting- Creation of a Datacenter infrastructure (Virtualization, Storage, Firewalls, Switching, BGP, ...)- Creation of a hosting offer for all users (VPS, Web, Mail, Dedicated, ...)- Implementation of an automated customer interface● Managed Services- Offering of managed services (Subscription / Actual consumed time)- Responding to customer requests- Diagnostics and incident response● Support- Support for Systems and Networks evolutions for clients- Proposal for Network infrastructure evolutions (Wifi / Wired)- Proposal for Systems infrastructure evolutions (Servers / Storage / Cloud)
- Lagardère News / Lagardère RadioSystems, Networks & Cybersecurity ExpertJanuary 2023 - Today (3 years and 5 months)Paris, FranceVersatile project assistance and MCS in Technical Direction.- Securing group and brand email dispatchesPlanning and integration of SPF/DKIM/DMARC/BIMI- Commissioning of an internal upload portalSolution research, load and compliance testing, publication- Technical and security administration for ELLE International brandsWebsite audits, zone delegations, project assistance- Versatile technical assistanceAssistance with Systems, Networks & Security issues and projects
- DocaposteSystems, Networks & Security EngineerTECHJanuary 2019 - Today (7 years and 5 months)94200 Ivry-sur-Seine, France- Level 2+/3 Support (Infrastructure)- Integration of systems solutions- Server administration- Network infrastructure administration- Implementation of the Bitlocker solution within the group- Cisco DNA Fabric Administration- Cisco ISE Solution Administration- Updating unsupported Microsoft Windows Server solutions- Active Directory cleanup (PowerShell Scripting)- SYSVOL migration for 22 DCs (FRS -> DFSR)- Updating the functional level of an Active Directory forest (3 domains, 22 DCs)- Maintaining the deployment of Windows 10 workstations- Updating all server certificates
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Education
- FORCYS (RNCP Level I), Architect in Systems, Network & Security EngineeringAFTI (Thales Group)2020FORCYS (RNCP niveau I), Architecte en Ingénierie Système, Réseau & Sécurité
- ERE Cyber (RNCP Level II), Systems, Networks & Security AdministratorAFTI (Thales Group)2018ERE Cyber (RNCP niveau II), Administrateur Systèmes, Réseaux & Sécurité