Marlbrook has worked with innumerable clients including:

• Professional Golfers' Association
• British National Archery  Squad
• Worcestershire County Cricket
• British Triathlon  Association
• Warwickshire County Cricket
• Leeds United Football Club
• Derbyshire County Cricket
• Birmingham Royal Ballet
• 220 Triathlon magazine
• Worcester Rugby Club
• English Cricket Board
• English Golf Union
• Aston University
• Running Fitness
• Runners' World
• Today's Golfer
• Optical Image
• Qualisys AB
• Sorbothane
• The Glade
• BUPA
• DTI
• plus many amateur athletes