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Network Administrator (m/f/d)

role at

SYNLAB International

As the European market leader in laboratory diagnostics, the SYNLAB group operates internationally since 2010 with about 24,000 employees dedicated to human medicine.

We are looking for a hands‑on Senior Network Administrator to design, implement, and operate our enterprise network across multiple international sites. The idóneo 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, and streamline operations via scripting.

Key Responsibilities

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

Develop scripts for backup/restore, inventory, API‑based object management (Fortinet/Cisco/Juniper)

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

Required Qualifications

5–8+ years in enterprise networking with multi‑site/global exposure

Proven expertise with Fortinet FortiGate and Cisco Firepower (FMC), 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; experience with Git workflows

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

Excellent communication skills; comfortable in an international environment

Language: Professional German and English required

Certifications (one or more): Fortinet NSE 4/5/6 (NSE 7 plus), Cisco CCNP Enterprise or CCNP Security (CCIE 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 Mist AI)

Observability tools (SolarWinds, Zabbix, Grafana)

What We Offer A demanding, varied and challenging activity in a successful and fast‑growing international company

Space for an independent and self‑sufficient way of working A friendly and open working atmosphere An expert environment with flat hierarchies and short ways for decisions A dynamic team that is looking forward to meeting you!

📌 Network Administrator (m/f/d) (Madrid)
🏢 Synlab International
📍 Madrid