Morrison, who joined Diesel six years ago, will launch the business in January, with a promise to help organisations "build, coach and sustain award-winning teams that accelerate change".
Morrison began his career in advertising with Saatchi & Saatchi in 1995, moving to Wieden + Kennedy and, in 2003, became head of marketing
He enjoyed a stint as the top marketer at video games developer Activision, working on the 'Call Of Duty' franchise, before joining Diesel as marketing director in 2008, He additionally assumed responsibility for the sales team last year.
It is understood that Diesel is yet to appoint a full-time replacement, with Morrison assisting in the recruitment process.
Morrison said: "Working with VCs and tech start-ups, brands and creative agencies, and PHDs and universities, I promise to deliver a mix of insight, practical experience and leadership thinking to co-create the future for those brave enough to face the challenges in their market in a new way."