Senior Network Security Engineer

Blend Technologies is a high-growth Technology and Innovation powerhouse. We orchestrate bespoke solutions for the most complex challenges in the global tech landscape.

Our expertise is deepened across six critical pillars designed to modernize and protect mission-critical systems:

• Cloud & Infrastructure: Building resilient, scalable foundations for the hybrid era
• Next-Gen Networks: Powering connectivity with speed and architectural precision
• DevOps & Automation: Accelerating delivery cycles through intelligent workflows
• AI & Data: Transforming raw information into predictive, actionable intelligence
• Cyber Security & Resilience: Moving beyond defense to proactive, stress-tested immunity
• Managed Services & IT Operations: Ensuring seamless performance so you can focus on your core mission

We possess a profound understanding of the technologies shaping the future—not just their capabilities, but their nuances and hazards. Our mastery lies in integration: the right combination, in the right sequence, at the right time. We don't just bridge the gap between today and tomorrow; we ensure our clients organization's journey is secure, sustainable, and strategically sound.

We are now looking for an experienced Senior Network Security Engineer to join our Group IT Infrastructure & Security teams. In this senior role, you will have a key contribution to the architecture, design, operation, and evolution of large‑scale enterprise network and network security infrastructures. You will act as a technical reference point, supporting mission‑critical services, driving automation and observability initiatives, and mentoring less‑experienced engineers.

Your Day will Look like:

• 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.