UK coaching consultancy founded by Sir John Whitmore in the early 1980s. Originator of the GROW Model, the world's most widely-used coaching framework.

Performance Consultants International is a UK-based coaching consultancy founded by Sir John Whitmore (1937–2017) in the early 1980s. The firm is best known as the originator and institutional home of the GROW Model, the four-stage coaching framework (Goal, Reality, Options, Will) developed by Whitmore and his colleagues that has since become the most widely-used coaching framework in the world.
Beyond GROW, Performance Consultants has been one of the foundational organisations in the development of executive and performance coaching as a discipline. The firm operates internationally as a coaching, training, and consultancy practice, working with corporate clients across leadership development, performance coaching, and organisational change. It remains the institutional steward of the GROW Model and continues to publish, teach, and develop the framework through Whitmore's canonical book Coaching for Performance.
Founded — Early 1980s, by Sir John Whitmore and colleagues
Founder — Sir John Whitmore (1937–2017)
Type — Coach Training Organisation / Coaching Consultancy (CTO)
Headquarters — United Kingdom, with international operations
Distinctive contribution — The GROW Model, originated and codified through Whitmore's Coaching for Performance
Canonical book — Coaching for Performance: The Principles and Practice of Coaching and Leadership by Sir John Whitmore (1992, now in its 6th edition)
Intellectual lineage — Inner Game tradition (Tim Gallwey) and the British human-potential movement of the late 1970s
Performance Consultants emerged in the early 1980s from Whitmore's collaboration with Tim Gallwey, the American sports psychologist whose Inner Game method had pioneered a non-instructional approach to performance coaching in tennis and skiing. Whitmore was an early convert to the Inner Game approach and partnered with Gallwey to bring it to a wider European and corporate audience.
The GROW Model itself emerged through this collaborative work in the 1980s. Whitmore and his colleagues at Performance Consultants distilled the Inner Game's open-ended inquiry into a four-stage conversational structure that could be taught and applied across coaching contexts. The model was codified in Whitmore's 1992 book Coaching for Performance, which became one of the foundational texts of the modern coaching profession and which is now in its 6th edition.
Across more than four decades, Performance Consultants has remained the institutional home of GROW and has continued to develop the model alongside its broader executive and performance coaching practice. Whitmore, who held the Whitmore baronetcy of Orsett Hall, passed away in 2017; the firm continues under the stewardship of its current leadership team and remains active in coaching, training, and consulting work internationally.
Performance coaching and executive coaching. Direct coaching engagements with corporate executives, leadership teams, and high-performing individuals. The firm's coaching practice has been a continuing reference point in the executive coaching field for more than four decades.
Coach training programs. The Performance Coach Certification teaches the GROW Model and the broader Inner Game-derived coaching methodology. Programs are recognised by the major professional bodies and are widely used in corporate coaching capability development and in management-as-coach training programs.
Organisational consulting. Leadership development, culture change, and high-performance team work, drawing on the same coaching philosophy. Work with senior leadership teams in large organisations is a continuing core offering.
Publishing and continuing development. Performance Consultants publishes books, white papers, and ongoing thought leadership on coaching, leadership, and organisational performance. Coaching for Performance, now in its 6th edition, remains the firm's canonical reference text and one of the most-cited works in the coaching field.
Two structural facts distinguish Performance Consultants in the global coaching field:
Originator of GROW. Performance Consultants is the institutional home of the most widely-used coaching framework in the world. Every coach who has ever used GROW, whether in formal coaching or as a manager trained in coaching skills, operates with a model developed at this organisation. The reach of this contribution is difficult to overstate: GROW is taught in coach training programs across every major professional body, in management development at organisations of every scale, and in the curricula of business schools globally.
Inner Game lineage. The firm's coaching philosophy is rooted in Tim Gallwey's Inner Game tradition, which predates the modern coaching profession and brings a distinctively non-instructional, awareness-based approach to performance work. This intellectual lineage is unusual in the corporate coaching world and shapes Performance Consultants' continuing approach: coaching is treated as the practice of evoking the client's own awareness rather than as the application of expert instruction.
The GROW Model, which originated at Performance Consultants, is the most-taught coaching framework in the world. It is used in coach training programs across every major professional body and in management development at organisations of every scale. Coaching for Performance has been translated into more than twenty languages and is one of the most-cited texts in the coaching field. Performance Consultants continues to operate internationally as a coaching, training, and consultancy practice, with a particular focus on senior leadership and high-performance contexts.
GROW is a structured framework for evoking awareness, grounded in the principle that people already possess the capability. The coach's job is to remove the interference that blocks it.
Performance Consultants International is the UK-based coaching consultancy that originated the GROW Model, the world's most widely-used coaching framework. Co-founded by Sir John Whitmore in the early 1980s, the firm has been one of the foundational organisations in the development of executive and performance coaching as a discipline. It operates today as a coaching, training, and organisational consulting practice in 43 countries.
Sir John Whitmore (1937–2017) was the co-founder of Performance Consultants and the pioneer of performance coaching. He defined the theory of the GROW Model in the 1980s, published the foundational coaching text Coaching for Performance in 1992, and wrote five books on leadership, coaching, and sports. He held the Whitmore baronetcy of Orsett Hall. He passed away in 2017; the firm continues under the current leadership team.
GROW stands for Goal, Reality, Options, and Will. Developed by Sir John Whitmore and colleagues at Performance Consultants in the 1980s, drawing on Tim Gallwey's Inner Game philosophy, GROW is the most widely-used coaching and goal-setting framework in the world. It is taught across every major professional coaching body, applied in management development at organisations of every scale, and used by institutions including Harvard and Google. The model is a structured conversational framework, not a mechanical checklist, for evoking the coachee's own awareness and capability.
The Inner Game is the performance philosophy developed by Tim Gallwey in his book The Inner Game of Tennis (1974). Gallwey observed that the main obstacle to performance is not lack of technical skill but interference from the performer's own inner critic and judgment. Performance coaching in the Whitmore tradition works by reducing that interference, evoking the coachee's own awareness and natural capability rather than directing or instructing.
Coaching for Performance, originally published by Sir John Whitmore in 1992, is the foundational text of performance coaching and the canonical guide to the GROW Model. Now in its 6th edition (co-authored by current CEO Tiffany Gaskell), it has sold over one million copies and been translated into more than 20 languages. It is used by coaches, leaders, and organisations worldwide.
The Performance Coach Certification is Performance Consultants' flagship training program, a five-module pathway to the GROW-based coaching methodology. The Silver level (modules 1–3) is ICF Level 1 accredited for the ACC credential. The Gold level (all five modules) fulfils the ICF PCC requirements via the Portfolio path. The program is also recognised by EMCC and AC.
Performance Consultants works in 43 countries across more than 20 languages. The firm delivers open-enrolment programs for individual coaches and custom in-house programs for organisations, including a Train-the-Trainer option. Clients have included Mastercard, Medtronic, IKEA, easyJet, Linde, and Davines.
The current leadership includes Tiffany Gaskell as CEO and David Brown as Founder and Chairman. Gaskell is an international authority on performance coaching who co-authored the 6th edition of Coaching for Performance. Brown has spent 30 years working on transformational leadership and global high-performance cultures.
It tells you the coach has been trained in the GROW Model by the organisation that originated it, the direct institutional line from Sir John Whitmore's work at Performance Consultants in the 1980s. The Silver level of the Performance Coach Certification is ICF Level 1 accredited (eligible for ACC credentialing); the Gold level satisfies ICF PCC requirements via the Portfolio path. The certification does not tell you whether the coach has formally applied for and received an ICF credential. Those are separate steps. Ask specifically whether they hold an ACC or PCC, and how many coaching hours they have logged since completing the programme.
Ask which certification level they completed: Silver (three modules, ICF Level 1) or Gold (five modules, ICF PCC Portfolio path). The Gold level involves substantially more supervised practice. Ask whether they hold an independent ICF credential (ACC or PCC), since programme completion qualifies a coach to apply but does not confer the credential itself. Ask how they use GROW in practice: a good coach will be able to describe concretely how the four stages shape an actual session, not just recite the acronym. Ask what kinds of clients they work with most often, since Performance Consultants trains coaches across executive, corporate, and performance contexts, all distinct orientations.