Marcus Sheridan is a renowned speaker, author and expert in inbound marketing and modern sales, best known for transforming his struggling swimming pool business into one of the most-cited examples of content marketing success in the industry. The story he built from that experience has shaped how thousands of businesses approach customer trust, content strategy and the integration of sales and marketing functions.

As CEO and co-founder of The Sales Lion, alongside leadership roles at PriceGuide.ai, The Question First Group, and previously as partner at IMPACT and River Pools, Sheridan has spent his career embedded in the practical work of helping businesses grow through better customer engagement. His teaching is firmly grounded in real revenue outcomes rather than marketing theory, drawing on his own experience navigating the 2008 financial crisis and rebuilding a business through transparency, education and trust.

Sheridan is the author of They Ask, You Answer, published by Wiley, which has become required reading for marketing and sales leaders building modern customer-acquisition strategies. The book has been adopted by businesses globally as a framework for content-led growth, and is part of the ExpertEdge book to course catalogue, transformed into structured video lessons, modular reading and assessments designed for enterprise LMS deployment.

His current work focuses on the integration of sales and marketing through customer-led content, the practices that distinguish trusted brands from forgettable ones, and the storytelling approaches that genuinely convert prospects into customers. For L&D leaders running sales enablement and marketing development programmes, his ExpertEdge title offers the kind of practical, revenue-anchored content that commercial audiences trust.