We could barely agree on what constitutes a terrorist act and how to even define one that does said, yet alone conclude we have an expert in the field.

The Subcommittee has found that practically every agency of the United States Government (USG) with a counterterrorism mission uses a different definition of terrorism. All USG agencies charged with the counterterrorism mission should agree on a single definition, so that it would be clear what activity constitutes a terrorist act and who should be designated a terrorist. Without a standard definition, terrorism might be treated no differently than other crimes. The Subcommittee supports a standard definition as follows: "Terrorism is the illegitimate, premeditated use of politically motivated violence or the threat of violence by a sub-national group against persons or property with the intent to coerce a government by instilling fear amongst the populace."
The only expert that I'm aware of is a real terrorist, and, as Ray pointed out, that expert may work fine say in Africa, but would know next to nothing in the Middle East.