Tim Castle is a globally recognized authority in negotiation, leadership and sales performance. In 2026, he was named one of the Top 10 Negotiation Professionals in the World by Global Gurus and won a Silver Medal at the Axiom Business Book Awards for The Momentum Sales Model. Castle teaches leaders, sales professionals and entrepreneurs to unlock unstoppable momentum and achieve high-stakes success. He hosts 'The Tim Castle Show' podcast, where he talks with elite performers and thought leaders. He is based in Singapore.