Private Investigation & OSINT

Private Investigation
& Intelligence
Training in Europe

Discreet · Professional · International

Licensed private investigator, OSINT expert, PhD researcher and educator. Operating across Europe with 10+ years of field experience and academic rigour.

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10+ Years Experience Active field investigator
8+ Countries International presence
PhD Researcher National University of Public Service
10 Publications Peer-reviewed research
Udemy Instructor Internationally recognized
About

Practitioner.
Researcher.
Educator.

Tarko Aron is one of Central Europe's most versatile private investigators — a practitioner who combines field experience with academic rigour.

With a background in criminal investigation (Hungarian Police 2013–2016), followed by positions at leading detective agencies across Hungary, and international presence in Ukraine, Sweden, Russia, Germany, and the United States — Tarko Aron brings genuine cross-border expertise to every engagement. He holds an MSc in Criminology from ELTE and is a PhD candidate at the National University of Public Service. He has lectured at ELTE, the National University of Public Service, and multiple universities across Hungary, and has spoken at international conferences in Chicago, Paris, and Stockholm.

10+
Years in investigation
10
Peer-reviewed publications
8+
Countries operated in
15+
Conferences & lectures
Experience

Career Timeline

2024–2025
Private Investigator
Inkal-Security
2022
CEO / Managing Director
Arko Security
2022
Private Investigator
Pinkerton
2018–2023
Regional Director
Koba Detective Agency
2017–2018
Insurance Investigator
Copy Group Kft
2013–2016
Criminal Investigator
Hungarian Police (Békéscsaba & Hódmezővásárhely)
Selected Publications
01
The role of OSINT in private investigation and national security services — Európai Jog, 2024/6
02
The role of HUMINT in national security services and private investigation — Felderítő Szemle, 2022
03
Comparison of laws and data acquisition methods of private investigation — Military National Security Reviews, 2023
04
Private investigation in England and France — DOSZ, XXVIII Tavaszi Szél 2025
What We Do

Investigation
Services

Discreet, professional investigative services across Central and Eastern Europe. Every engagement is handled with absolute confidentiality.

01 / 04
OSINT Analysis
Open Source Intelligence

Deep-layer open source intelligence gathering using advanced methodologies across public records, social networks, dark web, and proprietary databases. Legal, ethical, documented.

02 / 04
Corporate Intelligence
Due Diligence & Fraud

Pre-transaction due diligence, competitor intelligence, fraud investigation and risk assessment for corporations, law firms, and investment entities. Pan-European coverage.

03 / 04
Background Checks
Individuals & Organisations

Comprehensive background verification on individuals, business partners and organisations. Criminal history, financial standing, identity verification, and reputation analysis.

04 / 04
Field Investigations
Surveillance & Evidence

Physical surveillance, covert observation, evidence collection and case documentation in compliance with European legal frameworks. Admissible evidence, court-ready reports.

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Online Course · Udemy

Information Gathering
& Private Investigation
in Europe

The only comprehensive online course taught by an active European private investigator with a criminology MSc and PhD research background. Learn real methods used in the field — not theory from a textbook.

Legal frameworks for private investigation across EU member states
OSINT tools and techniques used by professionals
How to conduct background checks legally and effectively
Corporate intelligence and due diligence methodology
Field surveillance fundamentals and evidence documentation
Cross-border investigation: Czech, Slovak, Hungarian systems
Who This Course Is For
Aspiring Investigators Start your career the right way
Journalists Investigative research skills
Corporate Professionals Due diligence & compliance
Security Professionals Expand your OSINT capability

Join investigators, journalists, and security professionals from across Europe. Taught by a practitioner. Proven in the field.

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Information Gathering and Intelligence Analysis in Europe Udemy course
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Language
English
Platform
Udemy
Focus
European Investigation
Level
All Levels
Tarko Aron esetei – A felszín alatt book cover
Írta: Répássy Olívia
Click to Pre-order
Upcoming Book

Tarko Aron esetei
A felszín alatt

By Répássy Olívia · Based on Tarko Aron's accounts

A story-driven investigative book based on real methods and true-inspired cases from the field. Each chapter brings you inside the mind of an active European investigator — the decisions, the dead ends, and the breakthroughs.

"Every case begins with a question. The truth is rarely on the surface."

Real investigative methods explained through narrative
True-inspired cases drawn from years of field work
For investigators, readers, and anyone who wants to see beneath the surface

For investigators. For readers. For anyone who wants to see beneath the surface.

Learn the methods behind the stories →
Insights & Analysis

Field Notes &
Intelligence Briefings

OSINT

How to Conduct a Legal OSINT Investigation in the EU

A practical overview of the legal boundaries of open-source intelligence gathering in European jurisdictions. What's permitted, what's not, and how to document your findings.

2025 Read more →
Due Diligence

Corporate Due Diligence in Central Europe: What Lawyers Miss

A field perspective on the gaps that traditional due diligence processes leave open — and the investigative methods that fill them before a transaction closes.

2025 Read more →
Methodology

HUMINT vs OSINT: Which Approach Wins in Private Investigation?

Both human intelligence and open-source methods have their place. Understanding when to use each — and how to combine them — is the key skill separating amateur from professional investigators.

2025 Read more →
Get in Touch

Start a
Conversation

All inquiries are handled with complete discretion. Initial consultations are confidential.

Email contact@tarko-investigations.com
Direct aron@tarko-investigations.com
Phone +36 70 329 2956
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