Method before tool hype
A tool is only as good as the question, source criticism and documented assessment behind it.
06 · About
Professional experience.
Clearly translated.
Based in Berlin, I know OSINT from professional practice and from building resilient capabilities. I make that experience clear and useful for audiences in Germany and internationally.
GIAC GOSISANS SEC497Speaker & trainer
Photo · Tolga ManasirliBased in Berlin · Available internationallyProfile
Experience, translated with clarity and care.
I have worked professionally with open information for years, from structured research, verification and assessment to the development of resilient OSINT capabilities.
I am not interested in the next long tool list. What matters is how separate clues become an assessment that can be explained, and where uncertainty must remain visible.
That is the working method I bring to keynotes, workshops and advisory. Before each engagement, I clarify who is in the room, what they already know and what should genuinely stay with them afterwards.
Since September 2026, I have been a freelance lecturer in OSINT and digital investigations at VSW, the business security association for Hessen, Rheinland-Pfalz and Saarland. I teach the “Open Source Intelligence (OSINT)” module of its IHK certificate course “Koordinator:in – Betriebliche Ermittlungen & Interne Untersuchungen”. My teaching covers internet, person and company research, source assessment, image verification and the preservation of digital evidence.
I do not disclose confidential clients, institutional roles or operational cases. I provide the services described on this website independently of any institutional role.
View LinkedIn profileConfidentiality
Only authorised, abstracted information is published. Specific cases and sensitive work do not belong on this website.
Approach
Curiosity, responsibility and judgement.
Clarity before drama
Risk is made concrete without making it larger than the evidence supports.
Agency before fear
Strong communication ends with a realistic next action, not with the problem.
CertificationGIAC Open Source Intelligence (GOSI)
TrainingSANS SEC497 · Practical OSINT
CommunicationHigher education · Professional conferences
Next step
Put experience to work for your question.
Whether on stage, in a workshop or in strategic sparring, the starting point is always your concrete context.
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