How to find an Autism Spectrum Disorder specialist?

I started a small online community for people on the spectrum a while back. So far, its growth has been limited to a mere chat room, but however tiny, the chatroom appears to be well-established now, and close knit. However, with the userbase being autistic, often there are discussions that come up where nobody really has the relevant skills to adequately provide the support the chatroom is known for. This is where I feel a specialist would be an advantage. They would be able to bring the sum of their studies and have a kind of prior knowledge of what kind of situations people may be facing, and also be able to learn from us. Sadly, volunteers in this field are, as far as I'm aware, completely non-existent. However, I'm here to pick the brains of the wider world and try my luck.