The short answer
Mark Roberge was an MIT engineer who became HubSpot's CRO, and he treats hiring as the one input that determines everything downstream. His screen is deliberately unfashionable: he says he did not care whether you had industry experience or even sales experience, only whether you could learn what he needed to teach you, so coachability outranks pedigree. He then puts numbers on health that most leaders never set: 10 to 20 percent annual rep churn is fine, the industry's 30 percent is too high, and below 10 percent means he is being too soft, so he plans on 25 percent attrition as a buffer even when he is targeting 15. He is against player coach managers because they are constantly torn between developing their people and hitting their own number, and he warns that your top rep does not make your top manager. On pace, he says add roughly two reps a month over six months rather than a hiring spree after a raise.