In this episode of Coffee with Curtis, Robert is joined by David Zeff, co-founder and CEO of Whistle, a leading outbound SDR company helping B2B tech companies generate qualified pipeline. David is also a long-time friend and former colleague of Robert’s from their time at Graduway, where they worked together in a high-performing sales team that helped drive incredible growth and success. Together, Robert and David discuss what made that sales culture so powerful, why outbound sales is far from dead, and what companies often get wrong when building SDR teams. David shares how Whistle grew from an accidental first client into an international SDR business, and explains why cold outreach should be treated as a marketing channel, one that delivers not just meetings, but valuable market insight. They also explore AI in sales, where it helps, where the hype goes too far, and why human trust, judgment and connection still matter. A practical and honest conversation about sales, SDRs, outbound, AI, entrepreneurship and why great selling is still one of the most important skills in business.