Hi Slimemold,
(I love your name! :D )
Actually, a trauma therapist who specalizes in PTSD counts for everything. Group therapy would be a way distant second.
Building a support network of understanding carers is important, and that's what you can do best.
There is a great deal of information and resources here, along with sufferers and carers, who can give you guidance and assistance. I would recommend that you talk with people here and dive into the articles, and read the threads. The better educated you are about PTSD, the better you can help your loved one.
Your loved one is also most welcome to become a member here! We can encourage and be of help - but, even more than quitting smoking, etc... your loved one has to want to do therapy. You can give help, information, resources... yet that person must want to heal, must want therapy.. or they just won't do the excruciatingly difficult (but rewarding and healing) work to get well.
Please, please don't push group therapy as the first course of action. Being in a private safe environment with a good trauma therapist is so important, as most breaththroughs occur in the privacy of a therapist's office. Group is good, but as a first step? I wouldn't recommend it.
Please make yourself at home, Slimemold. There is a lot to learn, and a great deal of support here, for you and your loved one.
Warmest greetings!
(I tend toward an affection for Staph aureus, etc... myself; formerly in Greeber research :D )
Deer