I have not, but interestingly both the guys I started my career with made that switch. Both were technically smart but also enjoyed working with people, so they both went into sales engineering, supporting the sales process both pre and post-sales. Both have gone on to be very successful as sales managers and now directors.

But the key to their success was being technically strong enough to understand the customer's problem, and personable enough to work with clients as well as be able to explain very technical topics to less technical or non-technical people.