With Mick Terrill, then BKFC Heavyweight World Champion.
I help elite performers find the psychological patterns holding them back, and fix them, under real pressure, when it matters most. Sessions delivered remotely, to clients worldwide.
Book a Free Discovery CallAs featured in UD Music, on caring for your mental health as a performer.
With Mick Terrill, then BKFC Heavyweight World Champion.
Pressure looks different in every arena; the psychology underneath is the same. If your performance matters, this work is for you.
World champion and professional fighters, fight-camp preparation, comebacks, and performing on the biggest stage.
See fighters →World-class high-stakes players and WSOP finalists, sharper decisions and composure under real risk, on repeat.
See poker →Leaders and organisations who want the same edge as elite performers: focus, resilience, and wellbeing that drives results.
See corporate →You don't need a world title on the line. If you're capable of more than you're delivering, we find what's in the way.
How it works →System glitches limit high performance. Not pressure.
“After just 8 sessions, I've already had two major ‘aha’ moments that have directly impacted my mindset both on and off the tables. From a poker perspective, I've noticed clear improvements in my EV, decision-making clarity, and overall mental game. It's like the tilt filter has been upgraded — fewer leaks, sharper focus. But what really sets you apart is the holistic approach. It's not just about the cards or the strategy — it's about improving the whole player. I've seen positive ripple effects beyond poker: better emotional regulation, smoother relationships, and even my day-to-day life feels more balanced and less reactive. There's a sense of flow, both on the felt and in life. For any serious poker player looking to elevate their game and their lifestyle, working with you is +EV in every sense. Thanks again — grateful for the work we've done so far!”
“Marnie is really good and very professional! Really easy to talk to, and she made me feel very comfortable throughout. I would highly recommend her to anyone. As a professional boxer, Marnie really helped to keep my mind focused in camp and with everyday life problems. Really grateful and very happy with our work together — 10/10.”
“I am a professional poker player who worked with Marnie to improve my mental game and psychology. I didn't really know what to expect, having had her recommended by a colleague of mine. She was easy to work with and I felt comfortable sharing and opening up. Working with her was incredibly beneficial for me, not only for my job but overall in life. The main work we did together was actually helping me to transition into becoming a parent and balancing that with my working life, as well as learning to take my physical health more seriously, which in turn allowed me to grow mentally and be so much happier as a person. Highly recommended!”
“Way back at the end of 2011, I was fortunate enough to sign my second semi-professional rugby league contract. Even though it was my second, I still hadn't made my debut as a first-teamer. The season starts and still no sign of selection. A few more games pass and still living in the hope that I'll be selected. It had put my mindset in a place where I'd convinced myself that the error made was going to result in my name not being called up. It's like I was constantly on one life, a lot like playing Crash Bandicoot. We ended up halfway through the season and I threw in the towel. I even asked for a release but was encouraged to stay, as I was told my time would come. At the same time I was advised to speak to Marnie Merrilees, High Performance Psychologist. Marnie offered her services to the club and it was a turning point on a personal level. She helped me identify my strengths and weaknesses as a player and what I could do to work on them from a mental perspective. I'm my own worst critic, so making simple errors on the training ground wasn't acceptable, especially when you're not getting selected. For the time I spent with Marnie, she did help me shift this mentality and learn to not get hung up on the mistakes made. It's still hard because of the high standards I set for myself, but she helped me see things from a different perspective. 12 years on and I'm still working off the same model from back when we were first introduced. The competitive arena is a lot different now, competing in Brazilian jiu-jitsu, but I absolutely love the vulnerability of it. Words can't describe what it felt like to win, but I'm at a place where losing is something I can get over pretty quickly: learn from the mistakes and build on what we did well. Marnie laid down the foundation for me and I'm forever grateful. If you're an athlete outside of your day job and are looking for that extra edge to tap into your performance, then I'd highly recommend speaking to Marnie.”
“I've been working with Marnie now for 3 months and her work has massively helped me out in my fights and in my training leading up to a fight, working on everything that needs improvement to get the best performance I can. I've gained a lot in a short space of time working with Marnie. I highly recommend her to anyone wanting to improve their mindset and performance — she's very good at what she does.”
“Marnie is amazing at what she does and I would highly recommend her. Running a busy Sports Injury Clinic and being a very keen golfer, I contacted Marnie to help with my work-related stress, which was affecting my performance in golf. She has worked wonders, and when I now play golf my mind is fully focused on golf. My performance has improved massively, seeing my handicap come down from 20 to 14 in a short period of time. If you're wanting to improve your sporting performance, then get in touch with Marnie ASAP.”
“I would highly recommend Marnie. She helped a great deal with my issues (anxiety, negativity and confidence). Marnie makes you feel comfortable, respected and understood. She helped improve my outlook on competitive situations as something to look forward to, not dread.”
Apply for a free 15-minute discovery call: a conversation about what you're working towards and whether we're the right fit.