That was a mistake that we made. We started by hiring smart people and trying to let them figure out how to sell. I strongly recommend NOT doing that. In startupland, time is your greatest enemy and you don't have time for people to learn. Also, you probably aren't a sales expert, so you can't teach them what they need to know to be great.
Another mistake we made was hiring people who were good at selling other things. Medical device sales, consumer product sales, SaaS sales to SMB, SaaS sales to enterprise, etc. Once again, great sales people in other types of sales can learn to sell into your market, but it can take a long time and you probably don't have the expertise to teach them.
We spent 12 months trying to use smart people with no experience and sales people that were great at selling into different markets and generated essentially $0 in sales. We were ready to give up. Finally we hired a senior sales person from a competitor that was selling a very similar product, into the same market (med-large business) and we've taken off since then.
Your growth hack/shortcut was in the end, to poach a sales guy from a competitor who had clout with a bunch of customers in your field.
I thought sales was just sales and if you could sell one thing, you could sell anything. What I didn't realize is that selling B2B to a small business and selling B2B to an enterprise is as different as a skill set as writing compilers and building web scale applications. It takes years to get really good at each one of those things.
I've also learned that as a founder/CEO, most of my time is spent selling. I was a software engineer for 10 years and now I pretty much spend all day every day selling. Selling investors on why they should buy 25% of my company, selling potential hires on why we are the next big thing, selling the board on our new plan, selling customers on our product and selling employees on the company vision.
Once we had someone who knew how to sell SaaS to medium and large businesses, we just started doing what they considered obvious and fundamental. It was a revelation to us. :)
We started using software to send emails, track opens and clicks and then call prospects that did any of those things. You have to do a lot of dials, but eventually, someone answers. Of course they're not interested, so back to dialing. After 30 answers you'll get one that is interested.
Sales is just a numbers game. It's hard work. It's hella hard work. But send enough emails and make enough calls and you'll make some sales. And there is nothing like the feeling of closing a sale after grinding it out. Over time the sales add up, and before you know it, you are having a party with silly string and noise makers because you passed $1M in sales! (That was a fun day!!!)