Calderys at a glance

Leveraging over a century of experience, a global presence, and a truly diverse team, we work closely with customers and suppliers to turn our unique process insights into industrial solutions. We’re continuously looking to improve and innovate. Combining Calderys and HarbisonWalker International (HWI) creates additional scale and increased value for customers.

Picture of Michel Cornelissen


Industries around the globe are rapidly implementing changes to overcome the complex challenges defining our era.
As a privately owned company, proud of its long history and global footprint, we face this new era with optimism and aspirations.  

As such, it is my conviction that the transformation of the high temperature landscape calls for a new definition of expertise — one underpinned by precision, agility and, above all, new standards of customer-centricity. 

Our promise is founded on our global infrastructure of local plants and suppliers, our truly diverse team of experts and 100 years of process insights and technical know-how. 

With the combination of Calderys and HarbisonWalker International, we have a tremendous opportunity to bring together the best of both businesses and set a new benchmark for the industry. Our goal is to be the best in class. To be the best partner for our customers.

Thanks to our people, there are no limits to what we can achieve.


Michel Cornelissen

President and Chief Executive Officer



Everywhere you need us to be

With more than 5,000 people worldwide and an additional 1,500 from HarbisonWalker International, representing over 50 nationalities, Calderys has broken down barriers to create a truly global refractory network spanning production plants, local labs, sales offices, engineering centers, external partners, and full-time workers on customer sites. With a presence in over 30 countries and sales in more than 100 countries, we operate in proximity to our customers, to meet the specific needs and challenges of our local markets.

With a presence in over 30 countries and sales in more than 100 countries, we  operate in proximity to our customers, to meet the specific needs and challenges of our local markets.



Key figures

(*the following figures do not include HarbisonWalker International)

years' experience
million revenue (2022 results)
people worldwide inc. 2,000+ contractors
countries host our operations
customers and sales in 100 countries

Together, Calderys and HWI have 150+ years of combined experience, count 6,500+ people and contractors in over 30 countries, and 50 plants in the 5 continents.


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Oosterhout (Netherlands)

We have been active in the Netherlands since 1952, with offices and a refractory plant. Calderys Oosterhout designs and supplies materials for OEM projects in the petrochemical market, and is also a leader in maintenance projects for the Refinery and Chemical industries in the country.
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Haznedar Durer (Turkey)

Haznedar Durer is specialized in refractory bricks and monolithics. It serves 800 customers on five continents, with a total production capacity of 90,000 tons per year. Around 250 colleagues work on this site.
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Sézanne (France)

The plant has been operating since 1903. Annually, it produces 70,000 tons of tap-hole clay, refractory monolithics, and precast shapes for iron & steel and foundry industries, serving more than 400 customers in France and other countries
Amal sustainable Plant in Sweden

Calderys Leadership Team is composed of executives, valued for their strong knowledge of the business and years of experience in the industry. Truly  diverse and international, with five different nationalities, and 30% of women, the team defines Calderys’ strategic orientations and ensures the achievement of its ambitious growth plan. The Executive Committee leads the Group formed by the combination of Calderys and HarbisonWalker International.

Picture of Michel Cornelissen
Michel Cornelissen
President and Chief Executive Officer, acting as Senior Vice President, Americas
Michel has worked for more than 25 years within Imerys, where he started in Sales. He held various leading positions in the refractory business, serving most recently as Senior Vice President of the High Temperature Solutions business area and part of Imerys’ Executive Committee. Michel was instrumental in leading Calderys to become a standalone company.
Picture of Aurelien Cadars
Aurélien Cadars
Senior Vice President, EMEA
Aurélien started his career at Mazars as a Financial Auditor before joining Imerys. He has over 15 years of experience in leadership positions such as General Manager and Strategy & Operations Director. His last assignment was EMEA Thermal VP for Calderys.
Picture of Ish Garg
Ish Garg
Senior Vice President, APAC
Ish has spent the last 30 years in companies such as Exide, Siemens, Tata Steel and Imerys through various leading positions. He served as India Country Head for Imerys and Greater Asia Pacific Vice President for Imerys’ High Temperature Solutions business area.
Melissa Bihary
Melissa Bihary
Chief People Officer
Melissa has worked for more than 20 years in Human Resources on an international level in companies such as International Paper, General Electric (Aviation), Heinz/ KraftHeinz and Dover Company. She has a global expertise in all aspects of Human Resources with specialties in Talent management and organizational effectiveness, and is passionate about lean process improvement. Melissa joined HWI in 2018 where she was previously Vice President, People and Organizational Effectiveness.
Picture of Evelina Carp
Evelina Carp
General Counsel
Evelina has worked for over 16 years as in-house Legal Counsel in companies such as Faurecia, Saft, Air Liquide. She is a specialist in contract negotiation and management and international business law. Previously Evelina was Legal Manager for Refractory, Abrasives & Construction Business Area for Imerys.
Picture of Aurélie de Chassey-Hayot
Aurélie de Chassey-Hayot
Global Vice President, Communications
Aurélie has worked for 15 years in communications for companies such as TechnipFMC and Imerys. She has global expertise in building communications strategies, managing brands and leading through change. She was previously Communications Director for Imerys’ High Temperature Solutions business area.
Picture of Christian Dauvé
Christian Dauvé
Global Vice President, Commercial Excellence & Strategy
With more than 20 years of experience in Aeronautics and Minerals, Christian has held leading management positions across diverse functions. Having initially joined Calderys as Legal & HR Director, his more recent mission was that of APAC Vice President. Back from Asia, he is now our Global Marketing, M&A and Commercial Excellence VP.
picture of Aymeric Maupoumé
Aymeric Maupoumé
Global Vice President, Purchasing
Aymeric has over 15 years of international management in purchasing based in Europe, Middle East and Asia. He worked in companies such as Areva, Alstom Grid, General Electric and more recently Imerys, where he was Purchasing Director for the High Temperature Solutions business area.
Picture of David Secret
David Secret
Global Vice President, Operations Excellence
David has more than 25 years of experience in leading Operations. He started his career at Imerys as an Engineer and then evolved through leadership positions, such as Plant Manager, Managing Director, Industrial Director and more recently Industrial Operations VP for the High Temperature Solutions business area.
Picture of Bruno Touzo
Bruno Touzo
Global Vice President, Innovation & Technology
Bruno has worked for 25+ years in production and R&D in positions such as quality and process manager in the USA, or Director of Imerys Technical Center in China. Lately, he was Science & Technology VP for Imerys’ High Temperature Solutions business area strengthening innovation and addressing the product sustainability challenges.
Picture of Marielle Raulin-Foissac
Marielle Raulin- Foissac
Co-Chief Financial Officer
Marielle has almost 30 years of experience in Finance. She began her career in audit with Arthur Andersen. She worked in various senior finance positions for Lafarge, Materis and became CFO of Kerneos before joining Imerys and then Calderys. Marielle works in close cooperation with Ross Wilkin, co-CFO, in charge of HarbisonWalker International’s scope.
Ross Wilkin
Ross Wilkin
Co-Chief Financial Officer
Ross has worked more than 30 years in Finance both in private and public companies. He began his career in audit with KPMG. He worked in various senior finance positions for Marconi, Heinz Company and Universal Stainless & Alloy Products,Inc. He joined HWI in 2017 as Chief Financial Officer. Ross works in close cooperation with Marielle Raulin-Foissac, co-CFO, in charge of Calderys’ scope.