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Kayanan JegatheeswaranKJ

Kayanan Jegatheeswaran

Networks Consultant

€550/day
Paris, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Kayanan

Networks / Architect Consultant with +10 years of experience in LAN / WAN / Datacenter environments. I support CIOs, integrators, and infrastructure teams from design to deployment and RUN (L2/L3).

My strengths: architecture design, HLD/LLD writing, migration procedures (MOP), testing/validation, standardization, and maintenance in operational condition (MCO/MCS). I specialize in Datacenter Fabric Spine-Leaf architectures with VXLAN/EVPN, as well as SD-WAN projects and LAN/WLAN renewals.

What I can handle:

Audit & target trajectory (LAN/WAN/WLAN/DC), feasibility study

Architecture & documentation: HLD, LLD, DAT/DEX, runbooks, test plans

Datacenter: VXLAN/EVPN design & deployment, DC/WAN integration, redundancy & scalability

WAN / SD-WAN: migrations, failover/rollback, traffic optimization and security

Switching/Routing: VLAN/Trunk, STP, LACP/Port-Channel, BGP/MP-BGP, OSPF, routing policies

RUN L2/L3: diagnostics, incident resolution, continuous improvement, capacity planning

Automation: Ansible / Python to ensure reliability and speed up delivery

Environments & technologies

Cisco (Catalyst 9K, c8xxx routers, Viptela, Meraki), Aruba OS-CX / Aruba 10K / AFC (Aruba Fabric Composer), Fortinet, Pensando, Aruba/Cisco Wi-Fi, UCOPIA.

Sectors & achievements (examples)

Projects in the public sector (university hospitals), banking, transport, education, and multi-site environments: deployments, migrations, architecture renewals, standardization, and operational support (including large-scale scopes).

Certifications: Aruba ACSA / ACSP, CMNA, ACFE (Arista in progress).
Languages: French (native), English (fluent).

#VXLAN #EVPN #SpineLeaf #Datacenter #LAN #WAN #SDWAN #BGP #OSPF #Aruba #Cisco #Fortinet #Ansible #Python #HLD #LLD #MOP #Run #N2 #N3
  • French

    Native or bilingual

  • English

    Fluent

  • Tamil

    Native or bilingual

Can work on-site
Paris (up to 50km)

Experience

  • Secteur publique (Centre hospitalier universitaire de Caen)
    Networks / Cybersecurity Consultant (Datacenter Build)
    May 2024 - Today (2 years and 1 month)
    Project Task:
    Audit LAN/WAN, analysis of existing infrastructure and target trajectory. Write HLD/LLD, feasibility studies. Write migration procedures (MOP) + validation plan. Design target architecture and configure LAN/WAN. Implement VXLAN/EVPN (Datacenter Fabric) + testing/validation.
    Environment:
    Aruba OS-CX, Aruba 10K, AFC (Aruba Fabric Composer), Pensando.
    Aruba LAN/WAN Datacenter EVPN VXLAN
  • Secteur publique (Centre hospitalier universitaire de Nimes)
    Networks / Cybersecurity Consultant (Datacenter Build)
    January 2025 - December 2025 (11 months)
    Nîmes, France
    Project Task:
    Audit LAN/WAN, analysis of existing infrastructure and target trajectory. Write HLD/LLD, feasibility studies. Write migration procedures (MOP) + validation plan. Design target architecture and write LAN/WAN configurations. Implement VXLAN/EVPN (Datacenter Fabric) + testing/validation.
    Environment: Aruba OS-CX, Aruba 10K, AFC (Aruba Fabric Composer), Pensando.
    EVPN Aruba VXLAN DOE HLD
  • Secteur Bancaire (Société Générale) :
    International Branch Migration
    January 2016 - May 2024 (8 years and 4 months)
    Task:
    • Audit LAN/WAN/WLAN of international branches
    • Write HLD/LLD, feasibility study
    • Write migration procedures (MOP) + target architecture design
    • Design LAN/WAN configurations
    • Migrate branches to SD-WAN
    • Wi-Fi: audit, controller implementation, captive portal implementation
    Environment: Cisco 9k, Cisco c8XXX, Cisco Viptela, Aruba Silverpick, Cisco 9120, Fortinet 40F, 60F, 101F, Cisco DNA, UCOPIA.
    Cisco Networking LAN/WAN Ucopia

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Education

  • Master in Information Systems Management
    SUP DE VINCI
    2018
    MastèreManagerenSystèmesd'information
  • Networks and Business Bachelor's Degree
    ITECIA & Université Paris-Est
    2017
    LicenceRéseauxetEntreprises

Skill set

Categories