As a part of my employment I have been involved in bomb search and planning operations. I am currently investigating the prospects of setting up an advisory service for bomb threat evacuation and pre-planning. As a cautionary note and perhaps to state the obvious, niche products are also the most economically risky products to sell.
Security is also, often of necessity, a relatively closed branch.
Where it concerns worldwide connections, these can only come from your own already established contacts in the field. There is no way in for the uninitiated in this particular field of operations. There are however several ways in which to make progress into this field. If you feel you have the necessary competence to offer yourself or your organization in the training of others, then you must spend a good deal of time and thought in producing documentation describing the product and the people behind the product. Which particular field of operations that particular person has as a specialty.