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Konstantinos
Anyfantis
—CCIE
Designing, Implementing & Securing Advanced Network Infrastructures
CCDE & CCIE Enterprise Infrastructure certified Network Engineer based in Athens, Greece. Holds CCDE Design Expert and CCDE Specialist – Large Scale Networks credentials. 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
22
Certifications
50+
Technologies
CCDE Certified
Design Expert
CCIE Certified
Enterprise Infra
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 CCDE and CCIE Enterprise Infrastructure certifications from Cisco — among the most prestigious in the networking industry. My CCDE credentials cover both Design Expert and the specialist track in Large Scale Networks. 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, from telecommunications technician to senior network engineer. Each position contributed to a well-rounded expertise in network design, security, and operations.
I began my career as a telecommunications intern at COSMOTE, Greece's largest mobile operator, where I gained hands-on experience in telecom infrastructure and professional communication. Moving through IT support roles at the Municipality of Patras and EKRITOS GROUP, I developed a solid foundation in network administration, hardware troubleshooting, and end-user support. At Network Business Solutions and ALGOSYSTEMS S.A., I transitioned into pure network engineering, working with advanced routing protocols, enterprise firewalls, SD-WAN, and data center infrastructure. This progression reflects a deliberate career path focused on mastering every layer of enterprise networking.
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.
With over seven years of professional experience in network engineering and security, I have built a deep understanding of how enterprise infrastructure operates at scale. From designing multi-site routing architectures to implementing zero-trust security frameworks, every project starts with a clear understanding of business requirements and ends with a robust, documented solution. I work daily with technologies from Cisco, Fortinet, VMware, and F5, ensuring that network performance, availability, and security are never compromised.
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
A strong academic foundation in computer systems, information systems, and science communication. These degrees complement my technical certifications with analytical thinking and the ability to explain complex concepts clearly.
My academic journey started at the Technological Educational Institute of Messolonghi, where I earned my Bachelor's degree in Computer Systems, Networking and Telecommunications — the foundation of my technical career. I then pursued two Master's degrees at the Hellenic Open University: one in Information Systems, deepening my understanding of enterprise IT architecture, and another in Science Communication, which sharpened my ability to translate complex technical concepts into clear, accessible language. This unique combination of technical depth and communication skills makes me effective not only in designing networks but also in documenting them, training teams, and presenting solutions to stakeholders.
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.
I have earned certifications from the world's most respected networking and technology vendors. These credentials are not just titles — they represent thousands of hours of study, hands-on lab work, and real-world deployment experience. Each certification validates specific skills in network design, security implementation, infrastructure management, and emerging technology. I maintain all certifications through continuing education and practical application, ensuring my knowledge stays current with industry standards.
Cisco Certified Design Expert (CCDE)
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Cisco Certified Design Expert Specialist - Large Scale Networks
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Cisco Certified Internetwork Expert - Enterprise Infrastructure (CCIE)
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Cisco Certified Specialist - Data Center Design (CCS-DCD)
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Cisco Certified Network Professional Data Center (CCNP Data Center)
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LAN Installation Manager
0427540
Cisco Certified Specialist - Data Center Core (CCS-DCCore)
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Cisco Certified Specialist - Security Core
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Cisco Certified Network Professional Security (CCNP Security)
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Career Essentials in Generative AI by Microsoft and LinkedIn
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Cisco Certified Specialist - Network Security Firepower
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Social Networking Digital Skills Applied in the Work Environment (Social Media)
UGRSPUICT051917
Cisco Certified Specialist - Enterprise Advanced Infrastructure Implementation
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Cisco Certified Specialist - Enterprise Core (CCS-ECore)
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Skills & Technologies
My technical toolkit spans the full spectrum of enterprise networking and infrastructure. I work daily with routing protocols, security appliances, virtualisation platforms, and data center technologies. This expertise is built on years of hands-on lab practice, live network deployments, and troubleshooting complex multi-vendor environments. I continuously invest time in learning new technologies and earning vendor certifications to stay at the forefront of the networking industry.
Routing & Switching
Cisco Platforms
Fortinet / Fortigate
Infrastructure & Virtualisation
IT Support & Operations
Emerging Technologies
Languages
Professional proficiency in Greek and English enables effective collaboration with international teams, vendors, and clients across technical documentation and face-to-face communication.
As a native Greek speaker working in an international field, I communicate daily in English with vendors, certification bodies, and global enterprise clients. All Cisco, Fortinet, and F5 technical documentation, training materials, and certification exams are conducted in English, so professional fluency is essential. My language skills enable me to write detailed network designs (HLD/LLD), prepare technical reports, conduct vendor negotiations, and present solutions to both technical and non-technical audiences.
Greek
Native
English
Full Professional Proficiency
Frequently Asked Questions
Common questions about my certifications, experience, technologies, and availability. If you have a specific question, feel free to reach out through the contact section below.
My highest certifications are the Cisco Certified Design Expert (CCDE) and the Cisco Certified Internetwork Expert in Enterprise Infrastructure (CCIE Enterprise Infrastructure). These are among the most prestigious and difficult-to-earn credentials in the networking industry. I also hold CCDE Specialist certifications in Large Scale Networks and Design Expert tracks.
Download Full Resume
Complete professional profile in PDF format
The resume includes detailed career history, certification credentials, technical skills matrix, education background, and project highlights from my work at ALGOSYSTEMS S.A., Network Business Solutions, and earlier roles.
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
Last updated: 7 May 2026