Philip Marris, founder and CEO of Marris Consulting

Philip Marris, Founder and CEO of Marris Consulting – Expert in boosting operational performance, the Theory Of Constraints and Lean


Philip Marris has been successfully implementing the Theory Of Constraints combined with Lean for over 30 years in over 270 organisations worldwide. His principal skills are operational performance and project management. He is English but based in Paris, France. He is bilingual English/French.

Starting in 1986 he worked with Eliyahu Goldratt the founder of the Theory Of Constraints (TOC) and the author of the international best-seller The Goal and many other books.

He is the author of a very successful book in French Le management par les contraintes that describes how to implement TOC in factories; how to implement the ideas in the “business novel” The Goal.

He managed for many years the consulting business in the manufacturing and process industries of the largest French firms in this domain: Bossard Consultants and Cap Gemini Ernst & Young,

  • Cap Sogeti Industrie: Senior Consultant

  • Bossard Consultants / Gemini Consulting: Principal, in charge Manufacturing and Process Industries for France (75 consultants) and the European network (200 consultants).

He is the founder and CEO of Marris Consulting, founded in 2005 and based in Paris, France. He has worked all over the world (over 30 countries). Among his clients are: Air France, ArcelorMittal, Areva, Autoliv, Bayer, Bolloré, Bosch, Embraer, Essilor, GSK, Infineon, Ipsen, Jaeger LeCoultre, Lilly, Louis Vuitton, McDonald’s, Naval Group, Novartis, Pierre Fabre, Procter & Gamble, Nexter, Rolex, Safran, Saint-Gobain, Sanden, Schlumberger, Siemens, SKF, Thales, Valeo, Yves Rocher & Zodiac Aerospace. Half of Marris Consulting’s business is outside of France.

He actively contributes to the awareness of the Theory Of Constraints throughout the world: dozens of conferences every year, numerous articles, hundreds of videos …

He regularly hosts public and in-house training sessions on the Theory Of Constraints, Lean Manufacturing, TOC project management approach (Critical Chain Project Management), Lean Engineering …

He is currently writing a new edition of his book.

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