When you say "'professionals'" do you mean cult intervention professionals specifically or a wider range of professionals concerned about cults?
There are licensed counseling professionals that provide help to recovering cult victims.
For example see [www.culteducation.com
There are also researchers in the fiels of psychology and sociology that have published papers about cults and are well-known for their work in the area of cultic studies.
And there are some professionals within these categories of that have been qualified as expert witnesses in court proceedings and have testified about groups called cults.
See also [www.icsahome.com
The International Cultic Studies Association includes quite a few members and features links to other organizations concerned about destructive cults.
But aren't you going a bit off topic now?