Severely pruning overgrown Japanese Andromeda

[musiclvr56]

I called a gardening talk show and asked if one needs to rip out an overgrown shrub-I have a Japanese Andromeda. He told me to severely cut it back in the Fall. I just did a quick google search and it seems that this should be done in the spring, not the Fall. My first question is what season and my second question is do you agree that I should hire someone to do this-it is very tall and I have no idea what to do. I know it won't look good for a few years, but that's okay.

Thanks for your advice.

Karen