A polished resume tells you where someone has worked. An interview tells you how they talk about selling. Neither shows whether they can actually open a conversation, handle objections, hold under pressure, or move toward a close when a real customer pushes back.
That gap is expensive. Sales hiring is high-stakes, and the cost of a bad hire isn't just the wrong person in the seat — it's the revenue they never generate and the pipeline they mishandle while you find out.
The most reliable way to know is to watch a candidate sell before you hire them — in a situation that mirrors the job they'd actually do.