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Guillaume GarsonGG

Guillaume Garson

CTO, Cloud Architect, Devops, SRE

€800/day
12 projects
Marseille, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Guillaume

With extensive experience working with large corporations, as well as startups, SMEs, and a renowned hosting provider as head of hosting and cloud, technological transition is part of our daily lives, and I have made it my core business.

I am involved in all phases of this transition, from pure strategic consulting, auditing and proposing solutions, to complete implementation in the devops spirit where everything is automated, predictable, controlled; or simply as a punctual expert.
I have carried out numerous projects with the biggest cloud players (AWS, GCP, Azure, OVH, Scaleway) using technologies I have been using for years and which are now part of our daily lives, such as Kubernetes, Docker, Terraform, Gitlab, Prometheus, Grafana, and many others.
This transformation approach is very often accompanied by the creation of continuous integration and continuous deployment (CI/CD) workflows with a GitOps approach (ArgoCD) when the organization is compatible with this model.
  • French

    Native or bilingual

  • English

    Fluent

Can work on-site
Marseille (up to 15km)

Experience

  • Perfeos
    CTO, Cloud Architect, Devops, SRE Freelance
    CONSULTING AND AUDITS
    May 2018 - Today (8 years and 3 months)
    Région de Marseille, France
    Achievements:
    - Transformation from legacy to resilient cloud architecture on Kubernetes (audit, strategy and roadmap, containerization of all applications, implementation of the target solution with the entire technical stack to support/manage production, team training)
    - Transformation from client/server model to geo-redundant SaaS solution with automatic scalability based on usage (strategy and roadmap, containerization of all applications, implementation of the target solution with the entire technical stack to support/manage production)
    - Optimizations of costs, security, performance, and infrastructure resilience
    - Punctual expertise on automation, containerization, and CI/CD/GitOps workflow creation

    Technical environment
    - Cloud providers: Amazon Web Services (AWS), Google Cloud Platform (GCP), Microsoft Azure, OVH, Scaleway, and local hosting
    - Infrastructure as Code: Terraform, Ansible, ArgoCD
    - Containers and related ecosystem: Kubernetes, Helm, Docker, Rancher, Velero
    - Databases: MariaDB, PostgreSQL, MongoDB
    - Monitoring: Prometheus, AlertManager, Grafana, Datadog
    - Logs: Graylog, ELK (Elasticsearch, Logstash, Kibana), Loki, Fluentd
    - CI/CD: GitLab CI, Github Actions, TeamCity
    - Dev: Python, PHP, Bash

    Clients:
    - Software and SaaS solutions publisher: Heredis, Hyperness, Twindeal, Yzr, Bluenove, Adlin Science, Sponso+, The Programmatic Company, LivingPackets, Laiye, LineUP7
    - MVNO: Prixtel
    - Association: La Chaine du Droit
    - Large Account: Groupe Soufflet (agri-food), CMA CGM (world leader in transport and logistics), Stellantis
    - Cloud Provider: Monaco Cloud, Linkt
    Cloud computing Kubernetes Digital Transformation DevOps Terraform
  • Monaco Cloud
    Technical Director - CTO
    TELECOMMUNICATIONS
    November 2021 - November 2022 (1 year)
    Monaco, Monaco
    A fast-growing Monegasque cloud provider driven by a government initiative, Extended Monaco, aimed at modernizing and digitizing the entire principality. I took over the technical direction of the company in a context where almost everything had to be built. During my tenure, I:
    - Built the team (recruited 12 people)
    - Built and realized the company's cloud strategy
    - Oversaw technical direction
    - Evangelized externally on cloud usage
    - Ensured technical validation for all Cloud sales, advised on and deployed complex architectures, and served as the last level of escalation for support teams
    - Implemented the company's business continuity plan

    Managed a team of engineers located locally and remotely:
    - Organized, daily managed, supervised, and animated the team's activities, balancing performance and good humor
    - Coordinated common actions and projects with the marketing and sales departments

    Technical Direction:
    - Managed strategic technology suppliers and partners
    - Constant monitoring and anticipation of important market trends
    - Made structural choices to support company growth and product creation/evolution
    - Ensured technical consistency of ongoing and upcoming projects
    - Maintained a roadmap encompassing all projects
    - Represented the company at trade shows with sales teams
    - Participated in all phases of technical projects, from needs expression, RFP, design, to implementation (for some)
    - Highly secure environments subject to regular audits in preparation for PINH certification (equivalent to SecNumCloud in France)

    Technical skills
    - Complete VMware ecosystem: ESX, vCenter, NSX-T, vSAN, SDDC Manager, vRealize suite, vCloud Director, etc...
    - Other solutions are confidential
    CTO Cloud Architect Cloud computing Team Management Cybersecurity
  • Jaguar Network
    Head of Cloud Business Unit
    TELECOMMUNICATIONS
    June 2015 - April 2018 (2 years and 10 months)
    Région de Marseille, France
    Following a reorganization to support company growth, I took over the management of the Cloud BU. This was a cross-functional role involving technical, managerial, sales, marketing, and customer relations aspects. I was responsible for all products in the cloud portfolio (50% of turnover) as well as expertise requests or last-level support for over 1,000 clients. During these years, I:
    - built a team (recruited 14 people)
    - built and realized the company's cloud strategy
    - oversaw technical direction
    - evangelized internally and externally on cloud usage
    - ensured technical validation for all Cloud sales, advised on and deployed complex architectures, and served as the last level of escalation for support teams
    - implemented the company's business continuity plan

    Managed a team of engineers across 3 different sites:
    - Defined quarterly objectives, organized, daily managed, and animated the team's activities, balancing performance and good humor
    - Handled administrative tasks (leave, absences, performance reviews, training plans)
    - Coordinated common actions and projects with the marketing, sales, other BUs, and production teams

    Financial monitoring of the BU:
    - Prepared the department's provisional budget and monitored it daily
    - Contracted and negotiated with various suppliers
    - Made financial commitments autonomously or with management support depending on the amount

    Technical direction for the cloud scope:
    - Managed strategic technology suppliers and partners
    - Constant monitoring and anticipation of important market trends
    - Made structural choices to support company growth
    - Ensured technical consistency of ongoing and upcoming projects
    - Maintained a roadmap encompassing all projects
    Cloud computing Technical leadership Team Management Sales Strategy Datacenter

Reviews

5.0

Out of 11 ratings

LoïcL

Loïc

Responsable du service informatique - Ceneau

Reviewed on 5/6/2026

Rigorous, meticulous work delivered on time. Guillaume is detail-oriented and understands the stakes, producing very good reports on infrastructure and security. Recommended.
M

Maxime

Laiye

Reviewed on 11/13/2023

Guillaume is very competent; he perfectly supported us in our project to update our database versions on RDS. He also upgraded several versions of our K8S cluster. He is proactive and does not hesitate to suggest improvements. He is also a good communicator, keeping us regularly updated on his progress.

Recommendations

Claire BellivierCB
Frederic LegerFL
FU
+1
Claire Bellivier and 3 other people have recommended Guillaume

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Education

  • Engineering Degree
    Ecole Supérieur d'Ingénieurs de Luminy
    2006
  • University Diploma of Technology
    IUT Génie des Télécommunications et Réseaux
    2003

Certifications

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