David Szili - Managing Partner

Q: Where is David based?

David is based in Miskolc, Hungary and prefers 100% remote projects.

Q: What languages does David speak?

David speaks the following languages: Hungarian (Native), English (Advanced), French (Advanced), German (Elementary) .

Q: How many years of experience does David have?

David has at least 15 years of experience. During this time, David has worked in at least 6 different roles and for 7 different companies . The average length of individual experience is 2 years and 2 months . Note that David may not have shared all experience and actually has more experience.

Q: What is David's latest experience?

David's most recent position is Managing Partner at Alzette Information Security .

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

In recent years, David has worked for Alzette Information Security and SANS Institute .

Q: Which industries is David most experienced in?

David is most experienced in industries like Information Technology (IT) , Education , and Telecommunication . David also has some experience in Government and Public Administration , Banking and Finance , and Professional Services .

Q: Which business areas is David most experienced in?

David is most experienced in business areas like Information Technology (IT) , Marketing , and Project Management .

Q: Which industries has David worked in recently?

David has recently worked in industries like Information Technology (IT) and Education .

Q: Which business areas has David worked in recently?

David has recently worked in business areas like Information Technology (IT) .

Recommended expert

Miskolc, Hungary

Experience

Jan 2017 - Present

9 years 2 months

Hungary

Managing Partner

Alzette Information Security

Vulnerability assessment
Penetration testing
Red teaming
Security operations
Security architecture design
Security monitoring
Threat hunting
Incident response
Digital forensics

Jan 2017 - Present

9 years 2 months

Principal Instructor

SANS Institute

Teaching FOR572, FOR509
Former lead author of SANS DFIR NetWars

Jan 2017 - Dec 2020

4 years

Luxembourg

Event Organizer

Security BSides Luxembourg Conference

Finding sponsors
Maintaining web pages
Social media
Managing the event

Jan 2016 - Dec 2017

2 years

Luxembourg

Information Security Consultant

European Parliament (Everis Luxembourg)

Security monitoring
Incident response
Digital forensics
System hardening

Jan 2014 - Dec 2016

3 years

Luxembourg

Information Security Analyst

POST Telecom PSF

Secure architecture design
Firewall management
Security monitoring
Incident response
Digital forensics
System hardening
Patch management
Vulnerability management
Password management

Jan 2013 - Dec 2014

2 years

Luxembourg

Information Security Engineer

Dimension Data Financial Services

Penetration testing
Vulnerability assessment
Vulnerability management
Configuration reviews
Policy compliance
Wireless security
Mobile security

Jan 2011 - Dec 2012

2 years

Hungary

Information Security Consultant

Deloitte Zrt.

Penetration testing
Vulnerability assessment
Application security
Web security
Social engineering
Configuration reviews
Incident response
Computer forensics
Software development in C# and T-SQL

Industries Experience

See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.

Experienced in Information Technology (9 years), Education (9 years), Telecommunication (3 years), Government and Administration (2 years), Banking and Finance (2 years), and Professional Services (2 years).

Information Technology

Education

Telecommunication

Government and Administration

Banking and Finance

Professional Services

Business Areas Experience

The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.

Experienced in Information Technology (15 years), Marketing (4 years), and Project Management (4 years).

Information Technology

Marketing

Project Management

Skills

Practical Knowledge In Common Penetration Testing, Vulnerability Assessment, Incident Response, And It Forensics Tools, Including But Not Limited To C2 Frameworks (Metasploit, Cobalt Strike, Sliver, Havoc, Empire, Covenant, Koadic, Etc.), Maltego, Burp Suite Pro, Nessus, Qualys, Mcafee Vm, Nexpose, Netsparker, Nmap, Nikto, Sqlmap, John, Hashcat, Aircrack-ng, Magnet Forensics, Ftk, Sleuthkit, Volatility, Zimmerman Tools Etc.
Practical Knowledge In Network And System Security Technologies (Switches, Routers, Firewalls, Proxies, Vpns, Nids, Siem, Logging, Antivirus, Endpoint Protection Solutions, Etc.).
Experience With The Following Products: Microsoft Defender Advanced Threat Protection, Trend Micro Deep Security, Trend Micro Officescan, Sophos Utm, Palo Alto Networks, Fortigate (Fortimanager, Fortianalyzer), Splunk, Security Onion (Suricata, Zeek, Elastic Stack, Stenographer), Elastic Stack (Beats, Elasticsearch, Logstash, Kibana), Ibm Qradar, Cisco Sourcefire, Thycotic Secret Server.
Experience With Cloud Security Tools, Cloud Security Monitoring, Cloud Incident Response In The Following Cloud Technologies: Aws, Microsoft Azure, Microsoft 365, Google Cloud, Google Workspace, Ibm Cloud, Oracle Cloud, Alibaba Cloud, Tencent Cloud.
Programming Skills: Python, Powershell, Ruby, Java, Javascript, Shell Scripting, C#, (T-)sql.
System Administrator-level In Windows And Unix-like (Linux, Bsd) Operating Systems.
Practical Knowledge Of Owasp, Osstmm, Ptes Frameworks, And Iso 27001.

Languages

Hungarian

Native

English

Advanced

French

Advanced

German

Elementary

Education

Oct 2009 - Jun 2010

National Institute of Applied Sciences (INSA) of Toulouse

Master of Science · Networks and Telecommunication · Toulouse, France

Oct 2006 - Jun 2011

Budapest University of Technology and Economics (BME)

Bachelor of Science, High-Frequency Systems and Applications · Electrical Engineering · Budapest, Hungary

Oct 2004 - Jun 2011

Budapest University of Technology and Economics (BME)

Master of Science, Security of Information and Communication Systems · Computer Engineering · Budapest, Hungary

Certifications & licenses

ARTA

HackTricks

Advanced Security Training

Other

Amateur Radio (Level A)

Antisyphon Infosec Training

Other

Applied Network Defense

Other

Attacking Active Directory With Linux

Altered Security (formerly Pentester Academy)

BTL1

Security Blue Team

BTL2

Security Blue Team

Blue Team Labs

Other

CARTP

Altered Security (formerly Pentester Academy)

CAWASP

Altered Security (formerly Pentester Academy)

CCSKv4

Cloud Security Alliance

CEH

EC-Council

CESP - ADCS

Altered Security (formerly Pentester Academy)

CIRCL

Other

CRTE

Altered Security (formerly Pentester Academy)

CRTP

Altered Security (formerly Pentester Academy)

Cloud Guru

Other

Coursera

Other

Driver’s License (Category B)

FOR526

GIAC/SANS

FOR528

GIAC/SANS

GAWN (SEC617)

GIAC/SANS

GCDA (SEC555)

GIAC/SANS

GCED (SEC501)

GIAC/SANS

GCFE (FOR500)

GIAC/SANS

GCFR (FOR509)

GIAC/SANS

GCIA (SEC503)

GIAC/SANS

GCIH (SEC504)

GIAC/SANS

GCIL (LDR553)

GIAC/SANS

GCTD (SEC541)

GIAC/SANS

GCWN (SEC505)

GIAC/SANS

GLEG (LEG523)

GIAC/SANS

GMLE (SEC595)

GIAC/SANS

GMOB (SEC575)

GIAC/SANS

GMON (SEC511)

GIAC/SANS

GNFA (FOR572)

GIAC/SANS

GPEN (SEC560)

GIAC/SANS

GPYC (SEC573)

GIAC/SANS

GRTA

HackTricks

GSE

GIAC/SANS

GSEC (SEC401)

GIAC/SANS

GSP

GIAC/SANS

GX-CS

GIAC/SANS

GX-FE

GIAC/SANS

GX-IA

GIAC/SANS

GX-IH

GIAC/SANS

Hack The Box

Other

Hardware.io

Other

MGT305

GIAC/SANS

OASP

CloudBreach

OAWSP

CloudBreach

OSCP

Offensive Security

OSWP

Offensive Security

PAWSP

Altered Security (formerly Pentester Academy)

Pluralsight

Other

SEC402

GIAC/SANS

SEC450

GIAC/SANS

SEC455

GIAC/SANS

SEC524

GIAC/SANS

SEC534

GIAC/SANS

SEC540

GIAC/SANS

SEC545

GIAC/SANS

SEC546

GIAC/SANS

SEC564

GIAC/SANS

SEC579

GIAC/SANS

Udemy

Other

eCPPT Gold

eLearnSecurity

eMAPT

eLearnSecurity

eNDP

eLearnSecurity

Profile

Created

January 2026

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Frequently asked questions

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

Where is David based?

David is based in Miskolc, Hungary and prefers 100% remote projects.

What languages does David speak?

David speaks the following languages: Hungarian (Native), English (Advanced), French (Advanced), German (Elementary).

How many years of experience does David have?

David has at least 15 years of experience. During this time, David has worked in at least 6 different roles and for 7 different companies. The average length of individual experience is 2 years and 2 months. Note that David may not have shared all experience and actually has more experience.

What roles would David be best suited for?

Based on recent experience, David would be well-suited for roles such as: Managing Partner, Principal Instructor, Event Organizer.

What is David's latest experience?

David's most recent position is Managing Partner at Alzette Information Security.

What companies has David worked for in recent years?

In recent years, David has worked for Alzette Information Security and SANS Institute.

Which industries is David most experienced in?

David is most experienced in industries like Information Technology (IT), Education, and Telecommunication. David also has some experience in Government and Public Administration, Banking and Finance, and Professional Services.

Which business areas is David most experienced in?

David is most experienced in business areas like Information Technology (IT), Marketing, and Project Management.

Which industries has David worked in recently?

David has recently worked in industries like Information Technology (IT) and Education.

Which business areas has David worked in recently?

David has recently worked in business areas like Information Technology (IT).

What is David's education?

David holds a Master in Networks and Telecommunication from National Institute of Applied Sciences (INSA) of Toulouse, a Master in Computer Engineering from Budapest University of Technology and Economics (BME) and a Bachelor in Electrical Engineering from Budapest University of Technology and Economics (BME).

Does David have any certificates?

David has 70 certificates. Among them, these include: ARTA, Advanced Security Training, and Amateur Radio (Level A).

What is the availability of David?

David will be available part-time from April 2026.

What is the rate of David?

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