About Liam

Liam’s Story

Trusted by elite officials across world sport to bring out their best when it matters most

At the heart of mindwhistle is Dr Liam Slack , a leading performance psychologist with over 15 years’ experience helping elite sport officials perform with clarity, composure, and confidence. Liam is a HCPC Registered Practitioner Psychologist and previously served as Lead Performance Psychologist for English Premier League and EFL Championship Football Referees. His consultancy spans football, cricket, and rugby, supporting officials to stay sharp, focused, and resilient in high-pressure environments.

From Player to Psychologist: A Career Built on Performance and Purpose

Liam’s journey began on the pitch, first as a footballer with Doncaster Rovers FC then at the University of South Carolina Upstate in the USA, where he was later inducted into their Athletics Hall of Fame. It was during this time that Liam discovered his passion for understanding what drives peak performance under pressure. That passion evolved into a PhD in applied sport and performance psychology, where his international award-winning research explored Mental Toughness in Elite Football Officiating.

Working Across the World’s Biggest Stages

Liam has worked with Match Officials and Governing Bodies across the globe, including:

A Trusted Voice in Sport and Performance Psychology

In addition to his consultancy work, Liam regularly contributes to research, education, and media discussions around performance, wellbeing, and resilience in officiating. His work continues to shape how sports organisations around the world support and develop their officials. His mission is simple: to help every sports official cross the white line or boundary rope with confidence!

mindwhistle: Transforming Pressure into Perspective

Liam founded mindwhistle to make performance psychology accessible and impactful for sports officials at all levels. His approach is tailored, evidence-based, and grounded in trust – helping individuals and teams manage pressure, build positive habits, and trust their decision-making.