IKNOWHOW SA

Senior Network Security Engineer

IKNOWHOW SA

full-time

Posted on:

Location Type: Hybrid

Location: Athens • Greece

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Job Level

Senior

Tech Stack

CloudGrafanaSwitching

About the role

  • Participate in the design, implementation, and operation of complex enterprise routing and switching infrastructures across data center, campus, and WAN environments.
  • Design, implement, and operate firewall and network security platforms, ensuring secure connectivity, segmentation, and policy enforcement at scale.
  • Define and evolve network and network security architectures, applying defense‑in‑depth, least‑privilege, and security‑by‑design principles.
  • Architect, operate, and troubleshoot AAA services (RADIUS / TACACS+), supporting secure administrative and user network access.
  • Design, implement, and maintain Network Access Control (NAC) solutions, enforcing device posture assessment, user access policies, and compliance requirements.
  • Design and implement network automation solutions to improve reliability, consistency, and operational efficiency (e.g. configuration management, provisioning, validation).
  • Contribute to technology roadmaps, platform selection, and continuous improvement initiatives.
  • Collaborate closely with security operations, cloud, infrastructure, and application teams to ensure end‑to‑end service reliability and security alignment.
  • Drive standardization, documentation, and operational excellence initiatives.
  • Share knowledge, provide technical guidance, and mentor junior engineers within the team.

Requirements

  • Bachelor's degree in Computer Science, Engineering, or a related field
  • Have 5+ years of hands‑on experience in enterprise network engineering and/or network security roles.
  • Possess strong expertise in routing protocols (e.g. OSPF, BGP) and advanced switching technologies.
  • Have extensive hands‑on experience with enterprise firewall platforms (e.g. Cisco, Check Point, Palo Alto, Fortinet or equivalent).
  • Demonstrate solid, real‑world experience with AAA solutions (RADIUS, TACACS+) and NAC platforms.
  • Have hands‑on experience with network monitoring and observability systems, such as Zabbix, Grafana, SNMP‑based monitoring, NetFlow / IPFIX, and performance or capacity dashboards.
  • Have deep understanding of network security concepts such as segmentation, secure access, and incident response.
  • Are experienced in large‑scale, highly available, and compliance‑driven environments
  • Are comfortable working across on‑prem, hybrid, and cloud‑connected environments.
  • Hold relevant certifications (e.g. CCNP/CCIE, security certifications, vendor‑specific firewall, NAC, or automation certifications) — highly valued.
  • Are fluent in English (written and spoken).
  • Can operate effectively both independently and as part of a senior technical team
Benefits
  • Competitive Compensation package.
  • Career development and growth opportunities.
  • An amazing private & open-office workspace in Athens.
  • Medical plan and life insurance for you and your family.
  • Continuous training & learning opportunities via personalized seminars.
  • The opportunity to work in a diverse environment with talented colleagues.
Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools
routing protocolsOSPFBGPadvanced switching technologiesAAA solutionsRADIUSTACACS+Network Access ControlNAC platformsnetwork automation solutions
Soft Skills
technical guidancementoringcollaborationdocumentationoperational excellence
Certifications
CCNPCCIEsecurity certificationsvendor-specific firewall certificationsNAC certificationsautomation certifications