Abdelkader BARNAOUI

Provide ongoing maintenance, configuration, and support for Cisco Nexus series switches within an enterprise data center environment. Responsible for ensuring stability, performance, and compliance with best practices across production switching infrastructure. Technologies: Cisco Nexus 9000 series · NX-OS · Data center networking

**Accompagnement d’une migration réseau multi-sites de MikroTik vers FortiGate sur 27 sites d’entreprise**, en garantissant la sécurité et la continuité des opérations réseau tout au long d’une transition progressive. Au début de la mission, **3 sites avaient déjà été migrés vers FortiGate**, tandis que **24 sites restaient sous MikroTik**, nécessitant la mise en place d’une coexistence de routage maîtrisée et une coordination rigoureuse afin d’assurer une communication inter-sites et inter-équipements sans interruption. **Principales contributions :** * Piloter et accompagner la migration de MikroTik vers FortiGate sur plusieurs sites. * Concevoir et mettre en œuvre des stratégies de routage permettant de maintenir la connectivité pendant la phase de transition. * Configurer et standardiser 15VLAN par site, en garantissant une segmentation cohérente et l’application uniforme des politiques réseau. * Maintenir l’interopérabilité entre les environnements MikroTik et FortiGate durant la période de coexistence. * Documenter les architectures réseau, les plans d’adressage IP, les VLAN et les politiques de routage pour l’ensemble des sites. * Collaborer étroitement avec plusieurs ingénieurs réseau, dans le respect des processus de gestion des changements et des bonnes pratiques de communication afin d’éviter les conflits. * Participer aux phases de tests, de validation et de bascule progressive, avec un impact minimal sur les opérations.

Provide ongoing network operations, maintenance, and configuration for an enterprise environment, supporting business-critical infrastructure and day-to-day reliability. Responsible for maintaining, securing, and optimizing multi-vendor network devices, ensuring stability, performance, and compliance with best practices. Key responsibilities: Configure, maintain, and optimize Cisco routing and switching infrastructure Manage and troubleshoot enterprise network devices across production environments Perform incident response and root-cause analysis for network outages and performance issues Apply security hardening and configuration best practices Support change management, upgrades, and maintenance windows Collaborate with internal IT teams to ensure smooth operations Technologies & environments: Cisco routers & switches, enterprise routing & switching, firewall security, WAN/LAN infrastructure, network monitoring, production environments.

Top Rated Plus consultant delivering enterprise network, systems, and security solutions through BARNAOUI CONSULTING, a Top Rated Upwork agency, supporting organizations during migrations, complex operations, and critical infrastructure challenges. Clients engage when network instability, security risks, or failed implementations impact business operations and require expert intervention. How I support clients: Diagnose and resolve critical network instability and performance issues Design and deploy secure, scalable enterprise network architectures Implement and optimize SD-WAN and secure connectivity solutions Lead network and infrastructure migrations with minimal operational impact Deploy and harden enterprise firewall and security environments Troubleshoot complex production incidents under pressure Typical engagements include: Network architecture review and remediation Firewall & security deployments using enterprise best practices SD-WAN design, rollout, and optimization Infrastructure troubleshooting and post-implementation correction Stabilization of production environments

Achievements: Management of RFPs (Requests for Proposals) and configuration of network and security solutions in both BUILD and RUN phases. Planning Phase: Handling RFPs and designing technical solutions Writing HLD (High-Level Design) and LLD (Low-Level Design) documents and preparing deliverables Implementation Phase: Configuration and deployment of network and security solutions (Cisco, Fortinet, Palo Alto, Dell,Aruba, HPE, D-LINK, Grandstream) Supervision, administration, and optimization of infrastructure in RUN environments Post-deployment technical support, including incident resolution and regular updates Knowledge transfer and training for operations teams

Achievements: Implementation of an SD-WAN Automation Solution -Planning Phase: Preparation of the project specifications Development of a work plan -Implementation Phase: Set up the environment on the EVE-NG virtual machine Installation of vManage, vSmart, and vBond controllers Installation of vEdge for remote sites Installation of controller certificates Creation of VPN 0 and VPN 512 Creation of the IPSec tunnel Activation of services Creation of the NTP server Setup of MPLS backbone routers for Ooredoo and Tunisia Telecom Creation of security policies Creation of templates within vManage Creation of RestAPI scripts for automation -Technical Environment: Emulation tool: EVE-NG Routers: Cisco vIOS Switches: Cisco vIOS Controllers: vSmart, vBond, vManage, vEdge