Better information for better decision making
Encyclopedia of JihadUsing this public source openly and without resorting to
illegal means, it is possible to gather at least 80% of
information about the enemy
Samual V. Wilson
Director Defence Intelligence
AgencyNinety percent of intelligence comes from open sources.
The other 10 percent, the clandestine work, is just the
more dramatic. The real intelligence hero is Sherlock
Holmes, not James Bond
Chief US NICOpen source intelligence is the outer pieces of the jig-
saw puzzle, without which one can neither begin nor
complete the puzzle...open source intelligence is the
critical foundation for the all-source intelligence product
but it cannot ever replace the totality of the all-source
U.S. Central command80% of what I needed to know as CINCENT I got from
open sources rather than classified reporting. And within
the remaining 20%, if I knew what to look for, I found
another 16%. At the end of it all, classified intelligence
provided me, at best, with 4% of my command
Who we are
Founder and manager (ret.) of the Open Source Intelligence branch of the Dutch Defence Intelligence & Security Service since 1991, Internet since 1990, guest lecturer universities of Texas, Leiden, OSINT researcher, writer, speaker, consultant, OSINT trainer and mentor…
What we do
Reuser’s Information Services is concerned with delivering top class OSINT training programmes, in-hous as well as open, on a variety of levels and capabilities.
Looking for a proven, effective, applicable OSINT research methodology that will result in actionable intelligence? Try one of our training programmes or workshops.
All training programmes are organised by Triangular Group Academy.
Our blog with OSINT research tips and techniques, general OSINT related news, and much more. In categories with subscription offers.
Our video page will give you an opportunity to have a look at Arno in action. Interviews, presentations, briefings and more.
Have a look at our video’s, papers we have published, the Repertorium and the latest: the OSINT Bibliography.