Theodoros Skouras - Network Security Architect

Q: Where is Theodoros based?

Theodoros is based in Pyrgetos, Greece and prefers 100% remote projects.

Q: What languages does Theodoros speak?

Theodoros speaks the following languages: Greek (Native), English (Advanced), German (Intermediate) .

Q: How many years of experience does Theodoros have?

Theodoros has at least 19 years of experience. During this time, Theodoros has worked in at least 6 different roles and for 6 different companies . The average length of individual experience is 3 years and 2 months . Note that Theodoros may not have shared all experience and actually has more experience.

Q: What is Theodoros's latest experience?

Theodoros's most recent position is Network Security Architect at Freelancer / Consulting Services .

Q: What companies has Theodoros worked for in recent years?

In recent years, Theodoros has worked for Freelancer / Consulting Services and Far Galaxy Networks .

Q: Which industries is Theodoros most experienced in?

Theodoros is most experienced in industries like Information Technology , Banking and Finance , and Transportation . Theodoros also has some experience in Government and Administration , Telecommunication , and Aerospace and Defense .

Q: Which business areas is Theodoros most experienced in?

Theodoros is most experienced in business areas like Information Technology and Operations .

Q: Which industries has Theodoros worked in recently?

Theodoros has recently worked in industries like Information Technology .

Q: Which business areas has Theodoros worked in recently?

Theodoros has recently worked in business areas like Information Technology and Operations .

Recommended expert

Pyrgetos, Greece

Experience

Apr 2024 - Present

2 years

Pyrgetos, Greece

Hybrid

Network Security Architect

Freelancer / Consulting Services

Architect network solutions in hybrid and heterogeneous environments, both in cloud and on premises.
Workshop and Proof of Concept.
System and network hardening.
Penetration testing and vulnerability analysis.
Packet analysis and identification of root causes in heterogeneous and complex networks.
API security testing.
ISMS design and development for private sector (ISO 27001 compliant).
Produce and maintain technical documentation.
Technologies and methodologies used: OWASP, MITRE ATT@CK, ITIL v4, COBIT, Cisco IOS XE and NX-OS, Cisco ThousandEyes, Aruba, pfSense, Azure, AWS, Kali Linux, Burp Suite, Maltego, Metasploit, Nessus, Wireshark/tcpdump, Grafana, Zabbix, Proxmox, Debian Linux.

Jan 2018 - Apr 2024

6 years 4 months

Munich, Germany

Hybrid

Principal Network & Security Engineer

Far Galaxy Networks

Team leader of IT & network responsible for the overall company security posture.
Architect network solutions in hybrid and heterogeneous environments, both in cloud and on premises.
Management of IT & network and responsibility for the overall company security posture.
Produce and maintain technical documentation and guides leveraging Jira and Confluence.
System engineering of Linux clusters and data center farms.
Troubleshooting network and application performance.
System hardening following industry best practices.
Vulnerability assessments.
Technologies and methodologies used: ITIL v4, COBIT, SD-WAN Zscaler, Cisco IOS XE and NX-OS, pfSense, Fortinet, Sophos, Aruba, Docker/Ansible, Microsoft Azure, AWS, Linux, Proxmox, VMware, F5 Load Balancers, Palo Alto, shell scripting, Python Paramiko, Wireshark/tcpdump, Nessus.

Jan 2017 - Dec 2018

2 years

Munich, Germany

GALILEO Ground Network Monitoring Engineer

European Space Agency, DLR

Monitor and control GALILEO ground segment devices.
Perform troubleshooting and contingency activities.
Trouble ticket management.
Testing and integration of systems.
Review of element and segment operative procedures.
Contribution to preparation of reports.
Technologies and methodologies used: Linux, SNMP, Sophos, Forcepoint, GDATA, OpenLDAP, Alcatel-Lucent switches and routers.

Jan 2015 - Dec 2017

3 years

Thessaloniki, Greece

Senior Network & Security Engineer

Orange TS

Analyze business needs of potential customers.
Conduct workshops and proof of concept.
Implement IT projects according to business needs.
Maintain the overall company's on-prem infrastructure.
Provide second and third level support.
Technologies and methodologies used: Cisco routers and switches, Barracuda load balancers, virtualization (VMware vSphere, Hyper-V), Dell servers and storage, VoIP technologies (Cisco Call Manager, CUCM, Asterisk, FusionPBX), Linux.

Jan 2008 - Dec 2015

8 years

Athens, Greece

Network Engineer

Intrasoft International S.A.

Network design and implementation for the Public Insurance Institution of Greece using Cisco switches and routers, Cisco ASA for perimeter security, EIGRP, BGP and spanning tree protocols with over 100 points of presence connected via BRI and serial WAN links.
Design and implementation of mesh wireless network in the Port Authority of Piraeus with Cisco Aironet, wireless controllers, switches and routers.
Design and configuration of site-to-site VPNs for private banks using Cisco ASA.
Network design and implementation of Greek Police network with Fortinet appliances.
Network design and implementation for the Ministry of Development using Cisco routers, switches, ASA and IPS for perimeter security.
Implementation of information system network in Athens public transportation with HP MSM wireless controllers and HP5800 layer 3 switches.
Technologies and methodologies used: Cisco Catalyst switches (2924, 2950, 3550, 3760X Stackwise, 3950), Cisco layer 3 switches (6500), Cisco routers, Barracuda load balancer, web filter, antispam, HP MSM wireless controllers, HP ProCurve switches, Fortinet FortiGate, FortiAnalyzer, FortiManager.

Jan 2007 - Dec 2008

2 years

Athens, Greece

Network Support Engineer

Velti S.A.

Member of the internal IT department with focus on network operations.
Daily network and systems checks.
Redesign of the local network infrastructure according to company needs.
Presales of network equipment.
Technologies and methodologies used: Cisco Catalyst switches (2924, 2950, 3550), Microsoft servers.

Industry Experience

See where this freelancer has spent most of their professional time.

Experienced in Information Technology, Banking and Finance, Transportation, Government and Administration, Telecommunication, and Aerospace and Defense.

Information Technology

Banking and Finance

Transportation

Government and Administration

Telecommunication

Aerospace and Defense

Business Area Experience

See which departments and functions this freelancer has contributed to most.

Experienced in Information Technology and Operations.

Information Technology

Operations

Skills

Deep Knowledge And Hands-on Experience In Routing Protocols, Including Ospf, Eigrp, Bgp And Spanning Tree Protocols. More Than 17 Years Of Experience In Cisco And Fortinet Products, From Simple Layer 2 Switches To The Most Advanced Nx-os And Sase.
Packet Analysis Competency. Thorough Understanding Of Tcp/ip Stack And Demonstrated Skills In Packet Analysis With Wireshark And Tcpdump.
System Security Hardening Following Industry's Best Practices.
Threat Hunting Skills. Proactive And Security-oriented Mindset.
Curiosity. 18+ Years Experience In The It Sector Showed Me That Learning Is A Lifelong Process And Curiosity Is A Key To Success.

Languages

Greek

Native

English

Advanced

German

Intermediate

Education

University of West Athens

Information Systems Engineer · Information Systems Engineer · Athens, Greece

Athens Information Technology

Information Technologies & Telecommunications · Information Technologies & Telecommunications · Athens, Greece

Certifications & licenses

Cisco Ccnp

Cisco

Certified In Cybersecurity

ISC2

Fortinet Fcp - Network Security

Fortinet

Linux Foundation Certified System Administrator

Linux Foundation

Wireshark Certified Network Analyst

Wireshark

Statistics

Experience

Total positions 6

Experience in Information Technology 8 y

Avg length 3 y 10 m

Longest experience 7 y 11 m

Global Experience

Countries worked in 2 (Greece, Germany)

Primary country Greece

Expertise

Recent roles Network Security Architect, Principal Network & Security Engineer, GALILEO Ground Network Monitoring Engineer

Main industries Information Technology, Banking and Finance, Transportation

Main business areas Information Technology, Operations

Qualifications

Highest degree Master

Certifications earned 5

Profile

Created

April 2025

Last Update

November 2025

Need a freelancer? Find your match in seconds.

Try FRATCH GPT

Frequently asked questions

Do you have questions? Here you can find further information.

Where is Theodoros based?

Theodoros is based in Pyrgetos, Greece and prefers 100% remote projects.

What languages does Theodoros speak?

Theodoros speaks the following languages: Greek (Native), English (Advanced), German (Intermediate).

How many years of experience does Theodoros have?

Theodoros has at least 19 years of experience. During this time, Theodoros has worked in at least 6 different roles and for 6 different companies. The average length of individual experience is 3 years and 2 months. Note that Theodoros may not have shared all experience and actually has more experience.

What roles would Theodoros be best suited for?

Based on recent experience, Theodoros would be well-suited for roles such as: Network Security Architect, Principal Network & Security Engineer, GALILEO Ground Network Monitoring Engineer.

What is Theodoros's latest experience?

Theodoros's most recent position is Network Security Architect at Freelancer / Consulting Services.

What companies has Theodoros worked for in recent years?

In recent years, Theodoros has worked for Freelancer / Consulting Services and Far Galaxy Networks.

Which industries is Theodoros most experienced in?

Theodoros is most experienced in industries like Information Technology, Banking and Finance, and Transportation. Theodoros also has some experience in Government and Administration, Telecommunication, and Aerospace and Defense.

Which business areas is Theodoros most experienced in?

Theodoros is most experienced in business areas like Information Technology and Operations.

Which industries has Theodoros worked in recently?

Theodoros has recently worked in industries like Information Technology.

Which business areas has Theodoros worked in recently?

Theodoros has recently worked in business areas like Information Technology and Operations.

What is Theodoros's education?

Theodoros holds a Master in Information Technologies & Telecommunications from Athens Information Technology and a Bachelor in Information Systems Engineer from University of West Athens.

Does Theodoros have any certificates?

Theodoros has 5 certificates. Among them, these include: Cisco Ccnp, Certified In Cybersecurity, and Fortinet Fcp - Network Security.

What is the availability of Theodoros?

Theodoros is immediately available full-time for suitable projects.

What is the rate of Theodoros?

Theodoros's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.