Hi and welcome to the Chiari forum.
Can I assume VA is Veterans Administration? If so, thank you for your service to our country......and you will want to look outside the VA for help. Many of us find it very frustrating locating a well informed and experienced Dr outside the confines of the VA , so finding one inside will be more exasperating then it need be.
May I ask what testing you have had so far? What related conditions were ruled out? And do you know if your Chiari is congenital or acquired?