This site collects no personal data and uses no tracking tools. No tracking. Cookie Policy
Konstantinos
Anyfantis
—CCIE
Designing, Implementing & Securing Advanced Network Infrastructures
CCIE & CCDE certified Network Engineer based in Athens, Greece. Specialised in routing protocols (OSPF, MP-BGP, EIGRP), firewall deployment (Cisco, Fortinet), and VMware virtualisation. 7+ years of experience in enterprise networking and network security. Passionate about building reliable, secure infrastructures.
7+
Years Experience
5
Companies
20
Certifications
50+
Technologies
CCIE Certified
Cisco Elite Level
Building Networks That Perform Under Pressure
I'm a Senior Network and Security Engineer based in Athens, Greece. My focus is enterprise network design, routing, and security. I work with Cisco, Fortinet, SD-WAN, and network access control systems every day.
I hold the CCIE and CCDE certifications from Cisco — two of the highest in the networking field. At ALGOSYSTEMS S.A., I design and manage complex multi-vendor environments for enterprise clients. My work includes HLD/LLD network designs, Cisco ISE deployments, Fortinet firewalls, and F5 BIG-IP.
I started in IT support and telecommunications. Over time, I moved into network engineering and then into security architecture. Each step gave me a clearer picture of how networks fail — and how to build them so they don't.
Career Focus
- Enterprise network design and multi-vendor infrastructure
- Routing protocols: MP-BGP, OSPF, EIGRP, IS-IS
- Network security with Fortinet and Cisco (ASA, FTD, ISE)
- Secure SD-WAN deployment and management
Precision Engineering
I design networks that are resilient, scalable, and built to last. Every topology decision has a reason behind it.
Security at Every Layer
I integrate security from the perimeter to the core. Firewalls, NAC, SD-WAN — nothing is an afterthought.
Continuous Certification
I stay ahead by earning top industry certifications year after year. Learning is part of the job.
A well-designed network doesn't just connect systems. It protects them, scales with them, and outlasts the threats.
Career Journey
A track record of enterprise networking and infrastructure roles. View full profile on LinkedIn
Senior Network and Security Engineer
ALGOSYSTEMS S.A.
Administration and deployment of Fortinet Firewalls (40F, 60F, 90G, 70G, 120G, 200F, 400F, 900G). Management of Cisco Firepower appliances (FTD, FMC, FPR 2100 series). Deployment and configuration of Cisco ISE. Experience with Cisco Nexus (9000, N9K 93180YC-FX) & Catalyst (9200) switches. Virtualisation support with VMware ESXi. Implementation of routing protocols (iBGP, eBGP, OSPF, EIGRP). Design of high availability solutions (vPC, LACP). Network access control with FortiNAC. Secure SD-WAN Fortinet. Application delivery using F5 Load Balancer BIG-IP and F5-Cloud. Involvement in ISO audits and HLD/LLD network designs.
Senior Network and Security Engineer
ALGOSYSTEMS S.A.
Administration and deployment of Fortinet Firewalls (40F, 60F, 90G, 70G, 120G, 200F, 400F, 900G). Management of Cisco Firepower appliances (FTD, FMC, FPR 2100 series). Deployment and configuration of Cisco ISE. Experience with Cisco Nexus (9000, N9K 93180YC-FX) & Catalyst (9200) switches. Virtualisation support with VMware ESXi. Implementation of routing protocols (iBGP, eBGP, OSPF, EIGRP). Design of high availability solutions (vPC, LACP). Network access control with FortiNAC. Secure SD-WAN Fortinet. Application delivery using F5 Load Balancer BIG-IP and F5-Cloud. Involvement in ISO audits and HLD/LLD network designs.
Network Engineer
Network Business Solutions
Worked as a System Network Engineer handling enterprise network deployments and configurations. Responsible for routing protocol implementations (OSPF, BGP), Fortinet firewall management, and network troubleshooting across client environments in the Athens metropolitan area.
Network Engineer
Network Business Solutions
Worked as a System Network Engineer handling enterprise network deployments and configurations. Responsible for routing protocol implementations (OSPF, BGP), Fortinet firewall management, and network troubleshooting across client environments in the Athens metropolitan area.
IT Support Engineer
EKRITOS GROUP — SYNERGASIA
Provided comprehensive IT support across the organisation's infrastructure. Handled computer hardware maintenance, networking tasks, VMware virtualisation, and end-user support. Managed a wide range of hardware and software issues for a large corporate group.
IT Support Engineer
EKRITOS GROUP — SYNERGASIA
Provided comprehensive IT support across the organisation's infrastructure. Handled computer hardware maintenance, networking tasks, VMware virtualisation, and end-user support. Managed a wide range of hardware and software issues for a large corporate group.
IT Support Specialist
Municipality of Patras
Delivered IT support services for the Municipality of Patras. Responsibilities included network administration, printer management (Xerox), Microsoft Office support, and general helpdesk operations for municipal staff.
IT Support Specialist
Municipality of Patras
Delivered IT support services for the Municipality of Patras. Responsibilities included network administration, printer management (Xerox), Microsoft Office support, and general helpdesk operations for municipal staff.
Telecommunications Technician
COSMOTE Mobile Telecommunications S.A.
Worked as a Telecommunications Technician at COSMOTE, Greece's leading mobile operator. Gained hands-on experience in telecommunications infrastructure, teamwork in fast-paced environments, and communication with technical and non-technical stakeholders.
Telecommunications Technician
COSMOTE Mobile Telecommunications S.A.
Worked as a Telecommunications Technician at COSMOTE, Greece's leading mobile operator. Gained hands-on experience in telecommunications infrastructure, teamwork in fast-paced environments, and communication with technical and non-technical stakeholders.
Areas of Deep Expertise
Three core domains where technical precision meets real-world deployment experience across enterprise environments.
Network Infrastructure & Routing
Designs and manages enterprise networks from the ground up. Specialised in routing protocols, switching technologies, MPLS, DMVPN, and high-availability architectures. Comfortable with both greenfield builds and live network changes.
- MP-BGP / OSPF / EIGRP
- DMVPN / MPLS
- vPC / LACP
- Cisco Nexus 9000
- SD-WAN Fortinet
Network Security & Firewalls
Deploys and manages firewalls across Fortinet and Cisco platforms. Covers network access control, threat prevention, secure SD-WAN, and application delivery. Security is built in at every layer.
- Fortinet / Fortigate
- Cisco ASA / FTD / FPR
- Cisco ISE / FortiNAC
- F5 BIG-IP
- Cisco FMC
Infrastructure & Virtualisation
Hands-on with virtualisation, SAN storage networks, and enterprise IT operations. Skilled in VMware ESXi, Cisco MDS SAN switches, NAS, and end-to-end IT support for complex environments.
- VMware ESXi
- Cisco MDS SAN
- VPN / NAS
- SNMP / NNMi
- IT Operations
Education
Solid academic foundation combining technology, information systems, and science communication.
Master's Degree — Science Communication (EEP)
Hellenic Open University — School of Humanities
120 ECTSMaster's Degree — Information Systems (PLS)
Hellenic Open University — School of Science & Technology
120 ECTSBachelor's Degree — Computer Systems, Networking & Telecommunications
Technological Educational Institute of Messolonghi
Professional Qualifications
Active certifications from globally recognised bodies, spanning networking, security, and infrastructure.
Cisco Certified Internetwork Expert - Enterprise Infrastructure (CCIE)
00001e1261324818910f6be3…
Cisco Certified Specialist - Data Center Design (CCS-DCD)
e4f636af88a24b14bcff1009…
Cisco Certified Network Professional Data Center (CCNP Data Center)
3a639f6d08364a33ba8ec240…
LAN Installation Manager
0427540
Cisco Certified Specialist - Data Center Core (CCS-DCCore)
41852333181d4582b1554f48…
Cisco Certified Specialist - Security Core
6fb1de125b834f1d91f406fc…
Cisco Certified Network Professional Security (CCNP Security)
e8fbd33c597f46a4b1f5619a…
Career Essentials in Generative AI by Microsoft and LinkedIn
89ca16bccf79de74e8c66a35…
Cisco Certified Specialist - Network Security Firepower
4f2e9c4c277945e5854bb5c1…
Social Networking Digital Skills Applied in the Work Environment (Social Media)
UGRSPUICT051917
Cisco Certified Specialist - Enterprise Advanced Infrastructure Implementation
5CNJMQ3FEKBEQ352
Cisco Certified Specialist - Enterprise Core (CCS-ECore)
RNRH4YJP3GBEQ556
Skills & Technologies
Hands-on expertise across enterprise networking, security appliances, infrastructure platforms, and spoken languages.
Routing & Switching
Cisco Platforms
Fortinet / Fortigate
Infrastructure & Virtualisation
IT Support & Operations
Emerging Technologies
Languages
Spoken languages and proficiency levels used in professional and academic contexts.
Greek
Native
English
Full Professional Proficiency
Download Full Resume
Complete professional profile in PDF format
Let's Connect
Whether you're looking for an experienced network engineer, want to discuss infrastructure projects, or simply want to connect — feel free to reach out.
© 2026 Konstantinos Anyfantis. All rights reserved.
Athens, Greece