Sebastien VALTEL

CTO / IT Infrastructure & Operations Director / Interim Manager

Salaire / Taux journalier

92500 Rueil-Malmaison, France

Freelance, ouvert au CDI

Peut venir sur site

Expertises

CybersécuritéAdministration système & réseauNégociationITILAdministration de bases de donnéesOracleRequêtes SQLSAP ERPAzureAWSGoogle Cloud PlatformMicrosoft 365Azure ADKubernetesTerraformAnsibleGitLabKafkaSnowflakeDatabricksGLPIIntuneCoaching agileDevOpsServiceNowConduite du changementIoTn8n

Langues

Français (Maternelle)Anglais (Courant)

À propos

Introduction

IT Executive with 25+ years of experience across telecom, network, cybersecurity, and cloud computing domains. Strong background in IT consulting, operations, and digital transformation across banking, chemical, retail, energy, logistics, luxury, and French tech sectors. As an IT Director/CTO with 20+ years in leadership positions, I have successfully driven major transformation programs on a global scale, including: * Infrastructure Evolution: Led datacenter consolidations and cloud migrations (AWS/Azure/Hybrid), implementing Infrastructure-as-Code strategies with modern DevOps practices * Network Transformation: Deployed enterprise-wide SD-WAN, MPLS modernization, and SASE architectures across multiple continents (+ 3 000 sites) * Security & Compliance: Implemented comprehensive security frameworks (ISO27000, NIS2), SOC operations, and Zero Trust architectures * Digital Workplace: Modernized collaboration platforms, identity management (IAM), and delivered seamless M365/Google Workspace transitions Proven Leadership: - Managing international teams of 80+ professionals across 8 countries - Operating budget management exceeding €30M with CAPEX programs up to €45M - Orchestrating complex reorganizations while maintaining 24/7 business-critical operations - Delivering 3-5 year strategic infrastructure roadmaps aligned with business objectives Technical Excellence: Deep expertise in cloud platforms, virtualization (VMware), containerization (Kubernetes), enterprise networking (Cisco, Palo Alto), databases (Oracle, SQL), ERP systems (SAP), and modern data platforms (Snowflake, Databricks). My approach combines strategic vision with hands-on technical knowledge, ensuring successful delivery of complex transformations while developing talent and driving innovation. Experienced in interim management roles, I quickly assess, strategize, and execute to deliver immediate value. Seeking roles: CIO, CTO, VP Infrastructure, Infrastructure Director, Chief Datacenter Officer, or Interim Executive positions where strategic IT leadership drives business transformation.

Liens

Expérience de travail

Chief Technology Officer

LVMH Fashion GroupFreelance

mai 2026 - Présent

6 mois

Paris, France

Fashion Division — 9 Maisons (Céline, Loewe, Fendi, Givenchy, Berluti, Rimowa, Kenzo, Pucci, Marc Jacobs) + 3 affiliates — EMEA, Americas, Greater China, Japan, Korea, SEAO, Middle East • Lead the Division Tech function across the nine Fashion Maisons: governance model, technology standards and end-to-end delivery of a three-level service catalogue covering cloud, network, middleware and integration, service desk, ITSM and O365 collaboration services. • Drive the reorganisation of the Division Tech organisation, including the restructuring of the Asian setup around a new regional hub, the mutualisation of resources between Maisons, the creation of cross-Maison synergies and structural cost optimisation. • Sponsor the group SAP S/4HANA Central Finance programme for the Division (GCP, SAP BTP): run organisation and managed services model secured against demanding availability and recovery commitments, ahead of the US pilot go-live and the Asian rollout. • Delivered the Division RFP for proximity and service desk services, from partner selection through to the integration and progressive migration of the different markets onto the new partner. • Structure the integration and middleware platform (MuleSoft, Control-M to V-TOM, managed file transfer) and the observability standard (Dynatrace), and work with the Group on agentic AI use cases applied to IT operations. Key skills: Multi-Entity IT Governance, Service Catalogue & Delivery, Target Operating Model, Cloud (Azure/GCP), SAP S/4HANA, Middleware & Integration, ITSM/ServiceNow, Digital Workplace & O365, Service Desk RFP & Transition, Observability, Agentic AI, Cost Optimisation

Member

LE XV DSI

nov. 2024 - Présent

2 ans

Paris, France

Non-profit Organizations XV DSI is committed to a variety of exciting missions, aimed at enriching the academic and professional careers of its members: Sharing Expertise and Experience: We promote the exchange of knowledge through sporting and professional events, themed conferences, think tanks, and many other initiatives. Entraide Scolaire: We believe in collaboration between engineering schools and our companies, offering invaluable support to students through internships and work-study programs, with an emphasis on sports teams. Supporting women engineers in tech: We are committed to supporting women engineers, particularly future graduates, as they enter the job market, and throughout their professional careers.

Kering

déc. 2024 - mai 2026

1 an 6 mois

Paris, France

Infrastructure Deputy Director (Interim Manager)

juin 2025 - mai 2026

1 an

Paris, France

Infrastructure & Operation Dpt (~300 people) – France, Italy, UK, Singapore, USA, Dubai, Japan, India As Interim Manager reporting to the Infrastructure Director and Group CISO, responsible for leading major transformation programs across the entire worldwide infrastructure perimeter: ITSM, Network, Central Datacenters, Industrial Datacenters, Cloud, O365, and Cybersecurity. Program Leadership & Transformation: • Lead strategic managed services consolidation program, transitioning from multiple vendors to a single global partner with integrated delivery teams across India, Italy, and France. • Drive end-to-end infrastructure operations transformation, ensuring seamless transition while maintaining 24/7 service continuity across all regions. • Coordinate cross-functional workstreams covering the full infrastructure stack: network operations, datacenter management, cloud platforms, security operations, and workplace services. Operational Excellence & Governance: • Establish comprehensive ITSM framework and operational processes aligned with ITIL best practices across all infrastructure domains. • Define service level agreements (SLAs), key performance indicators (KPIs), and governance models for the new managed services operating model. • Ensure deep technical and process knowledge transfer to guarantee operational continuity during transition phases. Stakeholder Management & International Coordination: • Manage complex stakeholder relationships including Infrastructure Director, Group CISO, regional IT teams, and business units across 8 countries. • Orchestrate collaboration between internal teams and external partners (Accenture) to deliver transformation objectives on schedule. • Align transformation initiatives with Group cybersecurity policies and luxury retail operational requirements.

Infrastructure Global Head of Network (Interim Manager)

déc. 2024 - juil. 2025

8 mois

France, UK, Italy, Japan, Singapore, USA

Led a comprehensive global network transformation initiative, working closely with the Operations Director to restructure and enhance IT infrastructure across networks, WAN, cloud services, and cybersecurity. Managed a diverse team of 70+ professionals across 8 countries. Key achievements: * Advised on strategic reorganization and long-term infrastructure planning, including resource allocation and budget optimization * Successfully steered WAN infrastructure transformation, resolving integration partner challenges through improved relationship management and commercial negotiations * Provided expertise on strategic projects including SD-WAN implementation, MPLS phase-out, and cloud migration initiatives * Enhanced cybersecurity practices by addressing critical issues and aligning standards with CISO requirements * Maintained and evolved technical standards across the department * Prepared and executed knowledge transfer to ensure seamless transition to permanent leadership

Infrastructure Program Director (Interim Manager)

Veolia

mars 2024 - mars 2025

1 an 1 mois

Paris, France

As a Senior Interim Manager, I successfully led a major WAN transformation project encompassing SD-WAN, SASE, IoT, M2M, and Cloud Interconnect solutions across 900 administrative sites and 1,800 industrial sites nationwide. Given Veolia’s role as an Essential Service Operator (OSE) under NIS2, I placed a specialized focus on advanced cybersecurity measures, ensuring the protection of critical operations and seamless 24/7 connectivity. In this capacity, I served as a key advisor to the CIO, offering strategic counsel to navigate the complex intersection of technology and security. My proven expertise in directing large-scale programs empowered me to drive transformative changes, aligning network initiatives with Veolia’s business objectives and regulatory requirements. I also overhauled network infrastructures to enhance operational efficiencies and bolster cyber resilience against emerging threats. Through this ambitious transformation, I established a resilient, secure, and efficient network architecture, fostering continuous growth and sustainability for the organization. By anticipating future challenges and deploying innovative solutions, I ensured Veolia’s competitive edge in an evolving digital landscape—delivering the project on time and within budget, and elevating the company’s connectivity and security posture.

CTO / Infrastructure & Operations Director (Interim Manager)

CCI Paris IdF

avr. 2023 - mars 2024

1 an

Paris, France

Public Sector (EIG) - Infrastructure & Operations Dpt (+3500 Employees +15000 Students) Armed with a profound understanding of modern infrastructure technologies and software development practices, I am currently overseeing various critical areas, such as Networking & Telecoms, ToIP, Infrastructure Security, Compute & Storage, Datacenters & Cloud (AWS/Azure), Database Management (Oracle, SQL Farm), and SAP ERP (FI Module). I am assisting the client in the reorganization of their Infrastructure Department within their Economic Interest Group (EIG). Responsibilities: Strategic Reorganization: Spearheaded the reorganization of the Infrastructure Department, focusing on streamlining operations and improving service delivery. Datacenter Management: Led the relocation and setup of new datacenters, incorporating containerization strategies to optimize resource utilization. Security Implementation: Collaborated with the Chief Information Security Officer (CISO) to implement Identity and Access Management (IAM) and Secure Access Service Edge (SASE) structures. Developed a comprehensive cybersecurity strategy aligned with government regulations for the upcoming Paris Olympic Games. (ISO/IEC 2700x) Cloud Transition: Managed the migration from Google Workspace to Microsoft 365, ensuring seamless transition and minimal operational disruption. Operations Oversight: As the Infrastructure Director, responsible for the 24/7 operations services, ensuring high availability and performance. New Headquarters Infrastructure: Actively involved in the infrastructure planning for the new headquarters, including Local Area Network (LAN), Wi-Fi, cabling, and technical room setups. Future Data Solutions: Contributed to the conceptualization and planning of future data solutions, including next-generation storage and data analytics platforms.

Head of Infrastructure Technology Platforms (Interim Manager)

Hermès

nov. 2022 - mai 2023

7 mois

Vétheuil, France

HERMES IT - Technology Platforms Dpt (~60 people) Interim Manager responsible of the following areas within the Worldwide Infrastructure functions: Networking & Telecoms, ToIP, Infras Security, Compute & Storage, Database (M3, Cegid Retail Y2, SQL Farm), Datawarehouse (Snowflake), Datacenters & Cloud (AWS) Help the client manage transition (RUN/PROJECTS) during the recruitment process for the target organisation + Facilitate ex-manager to transition to New Move to Cloud Program This position requires Deep understanding of Modern Infrastructure technologies and software development practices including datacenters, networks, public cloud, infrastructure, containerization, CI/CD pipelines, databases, etc. Lead on Transformation Program & Infras Operations: - Budget +20M€ - Infrastructure Operations 24/24 - 7days (incident/change/problem mgt) - IT HR Department reorganization - Review on existing IT process, governance and IT frameworks - Sync with CISO / CERT to apply remediation action plan - Cloud Strategy Review (=Infras as Code: GitLab, Terraform, Ansible, Kubernetes,. + New LZ) - Service Catalog and SLA Review (Preparartion to move to New ITSM Product Service Now) - DRP / Business Continuity Review - Security Policy compliancy / Cybersecurity - Sourcing partners / Contract Review

VP IT Infrastructure & Workplace

Believe

oct. 2020 - déc. 2022

2 ans 3 mois

Paris, France

EXEC Member - Responsible of the following areas within the Worldwide Infrastructure & Workplace functions; Networking & Telecoms, Unified Communication, Infrastructure Security, Compute & Storage, Database, Datacenters & Cloud (AWS/Azure/AliBaba), O365, Azure AD, All Digital Workplace products. This position requires Deep understanding of Digital Workplace, modern Infrastructure technologies and software development practices including datacenters, networks, public cloud, infrastructure, containerization, CI/CD pipelines, databases, etc. The Department is in charge to Design / Build (Project Management/Integration) / RUN (Operate) all solutions and Business critical applications. Tasks delivered: - IT Department reorganization (Project to Product) - Total review on existing IT process, governance and IT frameworks - IT Master Plan review - Infrastructure Operations 24/24 - 7days (incident/change/problem mgt) - Datacenters Renew with Hybrid Public Cloud Strategy (=Infrastructure as Code: GitLab, Terraform, Ansible, Kubernetes, Kafka, ...) - Service Catalog and SLA creation - DRP / Business Continuity Review - Dataplatform Integration (Snowflake, Databricks) - Security Policy compliancy / Cybersecurity - Sourcing partners / Contract Review - End-user support Review (HelpDesk/HQ Genius Bar/Hotline /IAM Integration) - Asset Management Creation (GLPI, NETBOX) - End-User Device Management (MDM =MS Intune + Jamf for Apple Devices) - New Active Directory Design - IPO / M&A IT integration

IT Infrastructure Director, Europe

XPO Logistics, Inc.

oct. 2017 - oct. 2020

3 ans 1 mois

Neuilly/Lyon/Toulouse, France - Manchester/Crick, UK - Eindhoven, NL - Zelik, BE

Responsible of the following areas within the European Infrastructure function; Networking & Telecoms, Compute & Storage, AS400 Platforms & Database Administration, Datacenters & Cloud, ERP * EU Team reorganization and management (~80 people - 5 Direct Report - 7 Main EU countries) * To Manage Budget (OPEX>30M€/CAPEX>15M€) * Transform EU IT Supply Chain & Transport Org to a merged EU IT Corporate Team * Define and Apply Global Infrastructure Strategy for Europe - Datacenters consolidation - Transversal Teams consolidation - Business Partner Relationship (Supply Chain & Transport) - Service vs Costs efficiency - Technology Standardization - Enforce IT Security in compliance with Group Security Policy * To review all Infrastructure Operational Processes / ITIL v3 (=Operational Excellence) - Datacenters Management Operation 24/7 days - SAP DB RUN - DRP/BCP Yearly Executions - Service Delivery / Service Catalog Review - CMDB Review * To Define/Manage/Lead EU Projects (=EU Datacenters consolidation, M&A Infrastructure integration, Global WAN, LAN/WiFi on SaaS, Cloud Interconnect, Compute Virtualisation, AS400 MCO, Oracle MCO, DRP/BCP) * To manage relationship with external vendors & contractors (consolidation/savings plan) * To Manage and report to XPO Global CTO (US) and CIOs (EU/US) Technologies Portfolio: Avaya/Cisco/Aruba(Switching/Routing) + Check Point (FW) + Palo Alto (FW/IPS) + Fortinet (FW) + ForcePoint (SD-WAN) + F5 (LTM/GTM/LLC,AFM) + Cloud (Azure, VMWare, Google) + Zscaler (SaaS Proxy) + Dell/Cisco UCS Servers + PureStorage + IBM AS400/iSeries + EMC Storage + Database (Oracle Exadata/SQL) + SAP ERP (FI) + Backup Solutions (Veeam, Rubrik) + UC O365 (Skype/Teams) + MS Licensing (0365, SQL, Servers) + ITSM (ServiceNow)

Network Datacenters Service Line Director

ENGIE

oct. 2016 - oct. 2017

1 an 1 mois

Paris Area, France / Bruxelles, Belgium

Job Description: Global Network (Network & Security) Datacenter / Cloud Strategy / Team Management (~80 people) and cross team coordination (Plan/Build/Run) / Service Line P&L * Team reorganization (Service Line customer oriented) - Transformation plan to reorganize the whole Service Line to support new Engie IT strategy * To develop Datacenters and Cloud Strategy - Closing of old existing Datacenters (Locations : France and Belgium) - AWS and Azure Cloud deployment (Private and Cloud Interconnection) * To manage and develop teams with strong network and security expertise * To manage relationship with external vendors & contractors * To build new service line offers - New Remote access solutions based on OKTA SSO Solution - New 3rd party access solutions - New Datacenters Internet accesses with high availability - New Cloud proxy offer based on Zscaler Solution * To improve internal RUN processes and procedures (Change/Incident/Problem management) - Strong relationship with ENGIE IT GSOC * To Manage and report to ENGIE IT CEO+CFO on P&L (17M€ Sales) Technologies: Cisco's portfolio (Switching/Routing/WiFi/ToIP/Security) + Check Point (FW) + Palo Alto (FW/IPS/UA) Juniper (VPN SSL) + F5 (LTM/GTM/LLC,AFM) + Cloud (AWS, Azure, VMWare) + Fortinet (FW) + Zscaler

L'Oreal

nov. 2002 - oct. 2016

14 ans

L’Oréal – DOSI (CIO Department) / Clichy, France

Engineering/Integration Network Director

juil. 2008 - oct. 2016

8 ans 4 mois

L’Oréal – DOSI (CIO Department) / Clichy, France

Job Description: Global Network and Datacenter Strategy / Team Management and cross team coordination Team Missions (Scope = Telecom/Network/Security/Group Datacenters solutions) * To manage Team composed of internal and external consultants (15 people) * To study, to design and to provide solutions for all the main Group projects around the world. * To provide operational support for all the main Group implementations around the world. * To operate Telecom/Network/Security Group Solution * To report/advise Group CTO and Group CSO Lead IT on +50M€ (CAPEX): * L'Oreal Group WAN Transformation plan (+20M€) * L'Oreal Group Datacenter Hosting/Strategy ("World class"​ datacenters per continental region) - Design and Integration of EMEA/APAC Group Datacenters (+20M€) * ToIP/UC Group Strategy based on Cisco technologies - Design and Integration of EMEA, APAC ToIP Core (+10M€) - Global ToIP Strategy ==> Unified Communication integration study (Microsoft Skype for Business vs Cisco Jabber) * Internet HUBS worldwide deployment (China, Singapore, Hong Kong, Argentina) (+4M€) * L'Oreal WAN Optimization Solution based on Riverbed technologies Worldwide deployment (+3M€) * L’Oreal Group Security Operation Center / Escalation to CSIRT ==> Part of CyberSecurity Team * L’Oreal Group Mobile Device Management Strategy (iPhone/iPad/Android) * Cloud Hybrid/Private/Public Infrastructure study (AWS vs Azure) * IoT Study for Point of Sale (PoS) and Corp. deployments RUN (L2/L3) * Internet Security Gateways * ToIP France Cluster Technologies: Complete Cisco's portfolio (Switching/Routing/WiFi/ToIP/Security) + Check Point (FW) + Palo Alto (FW) + Juniper (Security) + Riverbed + Ipanema (QoS on WAN) + Allot (QoS on Internet) + F5 (LTM/GTM/LLC) + Blade Servers (HP/Cisco/IBM) + VMware (ESXi) + Airwatch (MDM) + Cloud (AWS, Azure) Methodology: Agile/DevSecOps

Engineering Network & Project Manager

déc. 2005 - juil. 2008

2 ans 8 mois

L’Oréal – DOM/DTI (ex-CIO Department) / Clichy, France

Job Description: Network Strategy / Team Management / Senior Architect Team Missions (Scope = Telecom/Network/Security/Group Datacenters solutions) * To manage Team composed of internal and external consultants (4 people) * To study, to design and to provide solutions for all the main Group projects around the world. * To provide operational support for the EMEA Group implementations. Project Management / Architect: * L'Oréal WAN QoS Solution based on Ipanema technologies Worldwide deployment (+140 sites) * L’Oréal Remote Access Solution (VPN SSL) based on Juniper technologies * L’Oréal Corporate WiFi based on Cisco technologies * RFI/RFP for Datacenter, Technical rooms and Cabling next-generation solutions Technologies: Complete Cisco's portfolio (Switching/Routing/WiFi/Security) + Check Point (FW) + Juniper (Security) + Ipanema (QoS on WAN) + Allot (QoS on Internet) + Nortel (Alteon)

Senior Network Architect / Project Manager

nov. 2002 - déc. 2005

3 ans 2 mois

L’Oréal – DOM/DTI (ex-CIO Department) / Clichy, Paris

Missions (Scope = Telecom/Network/Security/Group Datacenters solutions) * To study, to design and to provide solutions for all the main Group projects around the world. * To provide operational support for the EMEA Group implementations. Architect / Project Manager: * L'Oreal Group Datacenter Strategy - Design and Integration of EMEA Group Datacenter (+5M€) * L'Oréal GPRS/3G strategy and network/security standard * L’Oréal Remote Access solution based on Citrix technologies * RFI/RFP : Move of the L’Oréal Frame relay’s backbone to MPLS new design (+130 sites) Technologies: Complete Cisco's portfolio (Switching/Routing/WiFi/Security) + Check Point (FW) + Juniper (Security) + Streamcore (QoS on Internet) + Nortel (Alteon)

Network Security Architect

Nortel Networks

nov. 2000 - oct. 2002

2 ans

London, England / Dublin, Ireland / Madrid, Spain / Lisbon, Portugal

Nortel Network’s Team= Core Packet Switched Engineering (GPRS/UMTS Business Unit) Mission = To design and to provide solutions for core IP network in many European GPRS/UMTS operator deployment • Oniway GPRS/UMTS Project (Portugal) – 18 months ==> Pre-Sale, Design and Build • Esat Digifone GPRS Project (Ireland) – 3 months ==> Pre-Sale and Design • O² UMTS Project (England) – 1 month ==> Design • Xfera UMTS Project (Spain) – 1 month ==> Design Technologies: Complete Nortel's PS portfolio (Switching/Routing) + Check Point (FW) + Nortel (Alteon)

Network/System Architect

Logica

sept. 1999 - oct. 2000

1 an 2 mois

Admiral / CMG (ex-CMG LOGICA) / Paris, France

Mission = Move of the IP core LAN network dedicated to the Paris ABN AMRO trading room. • ABN AMRO Bank – 5 months Technologies = Cisco’s Catalyst portfolio Mission = System and backup solution administration • Societe General Bank – 7 months Technologies = System (Unix-AIX and Windows-NT), Networker, Control/M


Formation

EFREI - Grande école du numérique

Engineer’s Degree (=Master 2), Network & Security

1996 - 1999

4 ans

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