I have had some very good experience with a professional who, when I met her, had no clue about polyamory, but researched it, discussed it with me at some length, and then worked with me within the framework of poly to deal with my issues.
I have now recommended her and got overwhelmingly good feedback - she got to the real issues, rather than trying to "fix" the polyness.
Please check out The Birdcage - an open, friendly Polyamory forum for all parts of New York State
"Listen, or your tongue will make you deaf." - Native American Proverb