On 21 Oct 2005 13:32:05 -0700, wrote:

I have a garage with a corrugated asbestos roof.

So have I and hundreds around me.

Does this pose any health risk?

No, only if you take an angle grinder to it on a windy day with no
mask on. You are in more danger of harm from getting a chunk in your
eye.

If so, how to find a suitably qualified
company to safely remove it?

Only if you have a lot of spare cash in the bank to burn.
The general thought is leave it alone and it will cause no harm for
the remaining 40 or so years of it's life.