Johnson Matthey announced that John Walker, Executive Director and Sector Chief Executive of the company's Clean Air division would retire at the end of March next year.

Joan Braca would succeed John as Sector Chief Executive, Clean Air and be a member of the company's Group Management Committee (GMC).

Joan would join Johnson Matthey from Tate & Lyle where she is currently President, Food & Beverage Solutions. She had been a senior leader with Tate & Lyle since 2013, and prior to that time she spent almost 20 years in the speciality chemicals industry with Dow Chemical and the Rohm & Haas Company.

During Joan's successful career she worked in several locations including Singapore, China, Sweden, UK and the US.