It's a specialist niche. There are small industry groups in Aviation Security whose networks you could leverage to find work. If you are more a consultant than a contractor, then you might find these avenues limiting and you'd be better approaching airports and airlines directly.Your best options in this field are as an independent consultant, collecting information and work opportunities directly or through your network. If you've been working in this field for 25 years then your personal network will do more for you than anything.If you're looking for employed work then your opportunities will depend upon the breadth of your experience. You could apply for jobs with consultancies that work with the security services, such as Detica, and pitch yourself as a Subject Matter Expert in aviation. However, you would additionally need to demonstrate a breadth (not just depth) of experience.What you will likely find, unless you actively manage and focus your search, is that you end up with a lot of irrelevant information on "security consultancies". I use the quotation marks advisedly because most people hearing the phrase will assume you are referring to the hired thug industry, ranging from nightclub doormen to armed mercenaries.
