Freelancer profile translated to English.
Back to original languageAbout Mfinda Joao
System and Network Administrator with over 5 years of experience in various environments, I am passionate about optimizing and securing IT infrastructures. Specializing in LAN/WAN network management and system administration, I implement effective solutions tailored to each company's needs.
From network supervision to on-site support, including migration project management and IT security implementation, I assist companies in strengthening their IT environments and optimizing their performance. My career has allowed me to develop solid expertise in IT tools and practices, while staying attentive to technological evolutions.
Why choose me? I am solutions-oriented, responsive, and committed to delivering high-quality services. My approach is primarily collaborative: I take the time to understand the specificities of each organization to provide tailored answers. Together, we will implement a robust, high-performing, and scalable infrastructure to support your business in the long term.
Portuguese
Native or bilingual
English
Conversational
French
Native or bilingual
Can work on-site
Paris (up to 50km)
Experience
- OpenClassroomsSystem, Network, and Security AdministratorAVIATION AND AEROSPACEAugust 2024 - July 2025 (11 months)Paris, FranceExperience and Projects CompletedProject: Impact Influence – MultisiteRole: Lead Network AdministratorResponsibilities:Complete design of a three-site interconnected enterprise network.Configuration of Cisco routers, with OSPFv2/v3 and NAT.Implementation of VLANs, trunks, LACP, DHCP relay, and internal DNS.IPv4 and IPv6 configuration (dot1Q, SLAAC, DHCPv6, EUI-64).Network security through ACLs, NAT, and inter-VLAN filtering.Implementation of redundant routing and fault tolerance testing.Technical environment: Cisco Packet Tracer, IPv6, OSPFv3, VLAN, ACL, DHCP, DNS, NAT, IPv6 Dual Stack.Project: Local Network DesignCreation of physical and logical diagrams.IPv4/IPv6 addressing plan, VLANs, and routing.Technical presentation to decision-makers.Project: Secure Web InfrastructuresInstallation and hardening of HTTP/FTP servers.SSL/TLS encryption and permission management.Project: Integration of a New Active Directory EntityImplementation of an RODC for a remote site.Securing inter-site connections (IPSec, Stormshield).Project: Optimizing Scripts with Generative AIDebugging, improvement, and automated documentation of PowerShell scripts. Automation and IT system backupAnsible + PowerShell for automated user and backup management. Data security and encryption.Multi-Projects: AWS Cloud MigrationFeasibility study, monitoring, budget, and Cloud Architecture design.Supervision & Centralized LogsNagios supervision + Rsyslog + Alerting API.Complete documentation of the monitoring system.Audit and Penetration Test of an Active Directory DomainCompromise tests, privilege escalation, audit report, and action plan.Strengthening Critical InfrastructureApplication of ANSSI hardening rules.Communication of good security practices.
- ITECOM ART DESIGNIT Manager - System and Network AdministratorEDUCATION AND E-LEARNINGFebruary 2023 - December 2023 (10 months)Paris, FranceBudget monitoring for IT hardware and software purchases. Inventory management, returns, and disposal of end-of-life equipment, WEEE.➢ Recruitment, training, and scheduling of technicians.➢ Ensure the safety of technicians working on remote sites (technician equipment, safety visits…)➢ Creation and updating of on-site or remote technician procedures.➢ Production monitoring (migration accounts, software installation, license activation, workstation assignment, emails, etc.…), shipping of W10 + macOS workstations.➢ Monitoring of on-site and remote projects, assistance, schedules, and reports.➢ Daily monitoring of migrations, user support.➢ Kick-off meetings (IT part)➢ Budget Needs Expression➢ Planning (Over 90 IT tasks with interdependencies to plan and track over time)➢ Installation and configuration of servers via a scheduler.➢ Configuration of Switches, WIFI antennas, and firewalls.➢ Physical installation of equipment (or removal if closing), with or without external help.➢ Vendor Management (Low voltage – provider)➢ Asset Management➢ Acceptance Recycling – WEEE (for closures)➢ NAS to NAS implementation WITH SSL security.
- ABEILLE ASSURANCESSenior Technician N2N3 System and NetworkJanuary 2021 - January 2023 (2 years)filtros Eurofil, Bogotá, DC, Colombia• On-site support for over 500 users (N2)• Management of network and system incidents under Windows and MacOS• Deployment and configuration of workstations and peripherals• Implementation of backup and data recovery solutions
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Education
- BAC +4 MASTER SYSTEM, NETWORK AND SECURITY ADMINISTRATOROPENCLASSROOMSConcevoir et modéliser un systèmes d’information Installer et administrer des systèmes et des services réseaux Mettre en œuvre une politique de sauvegarde Évaluer et améliorer la sécurité des systèmes informatiques Veiller à appliquer la politique de sécurité sur l'infrastructure SI Gérer et résoudre les incidents techniques sur le réseau et les systèmes Gérer les périphériques utilisateur (comme les postes de travail) ainsi que les accès des utilisateurs Intégrer des solutions dans un système d’information Superviser le bon fonctionnement et la performance du système d’information Piloter des projets d’amélioration ou d’évolution du SI