David is a business consultant, trainer and author. He has been described as one of the leading thinkers in advertising and marketing operations. Having experienced extreme stress first-hand at work, and a consequent mental health crisis, David looked for ways to make internal and external relationships less stressful and more productive for everyone involved. The result was The Meikle Matrix, which became the basis for his second book, Tuning Up. It is also the basis of a successful leadership training course, and a business change programme and diagnostic called Prolibrus. David lives in Oxfordshire with his family, two whippets, and a couple of chickens.