Cybersecurity Officer
Current
Jan 2021 - Present
AeroLeads people directory · profile
John Lionas Email & Phone Number
Cybersecurity Officer
at
Hellenic National Defence General Staff / Directorate of Cyberdefence
LinkedIn matched
✓ Verified July 2026
3 data sources
Profile completeness 100%
Role
Cybersecurity Officer
Location
Greece
Company size
Who is John Lionas? Overview
A concise factual answer block for searchers comparing this professional profile.
Quick answer
John Lionas is listed as Cybersecurity Officer at Hellenic National Defence General Staff / Directorate of Cyberdefence, a with 105 employees, based in Greece. AeroLeads shows a matched LinkedIn profile for John Lionas.
John Lionas previously worked as Information Security Officer at Hellenic Air Force (Haf) and Quality Assurance Officer at Hellenic Air Force (Haf). John Lionas holds Master’S Degree, Communication Systems And Networks from Ethnikon Kai Kapodistriakon Panepistimion Athinon.
Company email context
Email format at Hellenic National Defence General Staff / Directorate of Cyberdefence
This section adds company-level context without repeating John Lionas's masked contact details.
Hellenic National Defence General Staff / Directorate of Cyberdefence
Review company-level records connected to John Lionas before choosing the right outreach path.
Profile bio
About John Lionas
Experienced Officer with a demonstrated history of working in the military, currently tasked with Information Security duties. Skilled in Information Security, Data Science, Networks, Systems Engineering and Quality Assurance. Strong information technology background with a Master’s Degree focused in Communication Systems and Networks from Ethnikon kai Kapodistriakon Panepistimion Athinon and another Master's degree focused in Signal Processing from University of Patras.
Listed skills include Radar, Systems Engineering, Aircraft Maintenance, Air Force, and 26 others.
Current workplace
John Lionas's current company
Company context helps verify the profile and gives searchers a useful next step.
Hellenic National Defence General Staff / Directorate Of Cyberdefence
Employees
105
AeroLeads page
4 roles
John Lionas work experience
A career timeline built from the work history available for this profile.
Information Security Officer
Oct 2012 - Dec 2020
Quality Assurance Officer
Jun 2008 - Sep 2012
Radar System Engineer
Dec 2002 - May 2008
4 education records
John Lionas education
Master’S Degree, Communication Systems And Networks
Master’S Degree, Signal Processing And Communications Systems: Theory, Implementations, Applications
Education record
Hellenic Army School Of Software Development (Http://Sphy.Army.Gr/),
Bachelor Of Science (B.Sc.), Telecommunications & Electronics Engineering
Hellenic Air Force Academy
FAQ
Frequently asked questions about John Lionas
Quick answers generated from the profile data available on this page.
What company does John Lionas work for?
John Lionas works for Hellenic National Defence General Staff / Directorate of Cyberdefence.
What is John Lionas's role at Hellenic National Defence General Staff / Directorate of Cyberdefence?
John Lionas is listed as Cybersecurity Officer at Hellenic National Defence General Staff / Directorate of Cyberdefence.
Where is John Lionas based?
John Lionas is based in Greece while working with Hellenic National Defence General Staff / Directorate of Cyberdefence.
What companies has John Lionas worked for?
John Lionas has worked for Hellenic National Defence General Staff / Directorate Of Cyberdefence and Hellenic Air Force (Haf).
How can I contact John Lionas?
You can use AeroLeads to view verified contact signals for John Lionas at Hellenic National Defence General Staff / Directorate of Cyberdefence, including work email, phone, and LinkedIn data when available.
What schools did John Lionas attend?
John Lionas holds Master’S Degree, Communication Systems And Networks from Ethnikon Kai Kapodistriakon Panepistimion Athinon.
What skills is John Lionas known for?
John Lionas is listed with skills including Radar, Systems Engineering, Aircraft Maintenance, Air Force, Defense, Avionics, Aerospace, and Engineering Management.
Find 750M verified contacts
Search by job title, company, industry, location, and seniority. Export verified B2B contact data when you need it.
Start free trialPeople with similar names
Check these profiles if this is not the John Lionas you were looking for.
John Lionas
3 email domains