My company is not particularly big but just in my team of a dozen or so we have members in Boston, Australia, Phoenix, and Seattle, and regularly deal with thos

My company is not particularly big but just in my team of a dozen or so we have members in Boston, Australia, Phoenix, and Seattle, and regularly deal with those in London, Tokyo, etc. It's not that unusual; in fact it's part of the reason Slack (and Hangouts) are so important.