Network Administrator

Cerrará Pronto
Polinyà, Spain
3 days ago

Role details

Contract type
Permanent contract
Employment type
Full-time (> 32 hours)
Working hours
Regular working hours
Languages
English
Experience level
Senior

Job location

Polinyà, Spain

Tech stack

IEEE 802.1X
Azure
Border Gateway Protocol
Cloud Computing
CompTIA Security+
Dynamic Host Configuration Protocol
Network Address Translation
DNS
Data-Flow Analysis
Hot Standby Router Protocol
Internet Protocol Security (IP SEC)
Intrusion Detection Systems
Virtual Private Networks (VPN)
Python
Network Security
Network Architecture
Network Diagrams
Routing
Packet Analyzer
Cisco Nexus Switches
Open Shortest Path First
Public Key Infrastructure
Ansible
Zero Trust Network Access
Virtual Local Area Networks
Virtual Router Redundancy Protocols
Wide Area Networks
Zabbix
Transport Layer Security
Identity Services Engine
Grafana
Juniper
Git Flow
SolarWinds (Software)
Code Inspection
Fortinet
Api Design
Firepower
Open Network Automation Platform
Cisco Switches
Cisco networks

Job description

We are looking for a hands-on Senior Network Administrator to design, implement, and operate our enterprise network across multiple international sites. The ideal candidate brings deep expertise in next-gen firewalls (Fortinet & Cisco Firepower), enterprise switching (Cisco & Juniper), and network automation. You will define network architectures, harden security, streamline operations via scripting. Responsibilities Architecture & Design

  • Define scalable, secure LAN/WAN/SD-WAN architectures and standards for global sites

  • Produce high-quality HLD/LLD documentation, network diagrams, IP schemas, and security policies

  • Evaluate and select technologies aligned with performance, security, and cost goals. Build & Implementation

  • Install, configure, and optimize firewalls: Fortinet FortiGate and Cisco Firepower (including FMC, policy objects, IPS/IDS, SSL inspection, HA clustering, SD-WAN)

  • Configure enterprise switches: Cisco Catalyst/Nexus and Juniper EX/QFX (VLANs, STP, LAG/MLAG, VRRP/HSRP, QoS, port-security, 802.1X)

  • Implement site rollouts, migrations, and cutovers with minimal downtime

  • Maintain and configure SASE platform Operation & Security

  • Own Level 3 incident/problem management; perform advanced troubleshooting (packet captures, flow analysis, logs)

  • Maintain firewall and switch gold configs, rule hygiene, and change control (ITIL)

  • Ensure compliance with security baselines, segmentation, and zero-trust principles

  • Monitor capacity/performance and proactively remediate risks Automation & Scripting

  • Build and maintain automation for configuration, compliance checks, and deployments using Python and/or Ansible (e.g., templates, linting, CI/CD pipelines)

  • Develop scripts for backup/restore, inventory, API-based object management (Fortinet/Cisco/Juniper) Collaboration & Governance

  • Work cross-functionally with Workplace, Cloud, Security, and Site Operations teams

  • Support audits and contribute to policy development and continuous improvement

  • Mentor junior engineers; act as technical escalation point

Requirements

  • 5-8+ years in enterprise networking with multi-site/global exposure

  • Proven expertise with Fortinet FortiGate and Cisco Firepower (FMC), including policy creation, NAT, VPN (IPsec/SSL), and HA

  • Strong experience with Cisco and Juniper switching (Layer 2/3, routing protocols OSPF/BGP, EVPN/VXLAN nice to have)

  • Solid understanding of network security (segmentation, NAC/802.1X, IDS/IPS, TLS inspection), DNS/DHCP/IPAM, and PKI fundamentals

  • Automation: Proficiency in Python and/or Ansible for network tasks; experience with Git-based workflows

  • Experience operating under ITIL (Change/Incident/Problem) and creating high-quality documentation

  • Excellent communication skills; comfortable in an international environment.

  • Language: Professional English are required

  • Certifications (one or more of the following)

  • Fortinet: NSE 4/5/6 (NSE 7 is a plus)

  • Cisco: CCNP Enterprise or CCNP Security (CCIE a plus)

  • Juniper: JNCIS-ENT / JNCIP-ENT (JNCIE a plus)

  • Security: CompTIA Security+ or CISSP (plus) Nice-to-Have

  • Familiarity with cloud networking (Azure)

  • Exposure to modern NAC (Cisco ISE, Aruba Clearpass), SASE/ZTNA, and wireless (Cisco Meraki, Juniper MistAI )

  • Observability tools (e.g., SolarWinds, Zabbix, Grafana)

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