Our Organization

Archroma is headquartered in Reinach near Basel, Switzerland, and operates with approximately 3000 employees over 35 countries and 25 production sites. The company operates with three Businesses: Brand & Performance Textile Specialties, Packaging & Paper Specialties and Coatings, Adhesives & Sealants, which are managed from Singapore, Switzerland and Brazil respectively.

Archroma’s skilled senior leadership team brings together significant experience in the chemicals and process industries.

Alexander Wessels
Chief Executive Officer (CEO)

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Alexander “Xander” Wessels is at the helm of Archroma since its beginning in October 2013, bringing along 25 years of chemical, pharmaceutical and process industry experience.
Before joining Archroma, Mr Wessels spent 7 years at Royal DSM NV, where his last position was President and CEO of DSM Pharmaceutical Products, a global pharmaceutical ingredients and contract manufacturing organization.
Previously, he held various management and executive positions at Unilever, Quest International, ICI, and as Executive Committee Member of Campina.
A Dutch native, Mr Wessels has lived and worked in a number of countries around the globe. He brought to Archroma an impressive track record of driving improved business performance, disciplined growth on a global scale and the implementation of strategic initiatives focused on high growth economies, innovation and sustainable solutions.
Mr Wessels holds an MSc in Molecular Sciences from Wageningen University in the Netherlands, and both an MSM and MBA from the Krannert Business School of Purdue University in the United States and Tilburg University, in the Netherlands.


Roland Waibel
Chief Financial Officer (CFO)

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Roland Waibel is CFO of Archroma since its beginning in October 2013.
He has more than 25 years of global and diverse chemical and process industry experience, having held key financial and executive leadership roles at both publicly listed and privately owned companies.
Mr Waibel possesses significant experience in business process/change management and has led global business services organizations including IT, corporate development and shared services.
Before joining Archroma, Mr Waibel was Chief Financial Officer and a Member of the Executive Board at Omya Management AG, a privately owned, global producer of specialty materials. Previously, he held the position of Group CFO at Lonza Group AG, a publicly traded global producer of organic and fine chemicals.


Stephan Sielaff
Chief Operating Officer (COO)

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Stephan Sielaff joined Archroma in February 2014, bringing significant, diverse and global materials and process industry expertise.
Before joining Archroma, Mr Sielaff spent 8 years with Symrise, lastly as the Senior Vice President Global Operations of the Flavor & Nutrition business. There he was overseeing the complete global supply chain operations, which he developed and implemented for 26 sites in 20 countries.
Previously, Mr Sielaff held various roles in supply chain, innovation and engineering, as well as marketing at Unilever.
Mr Sielaff has a MS, Chemical Engineering from the Technical University of Dortmund, Germany.


Hans Lourens
General Counsel

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Hans Lourens joined Archroma in October 2013 with 15 years of in-house legal counsel experience.
Mr Lourens has significant expertise in the drafting and negotiation of contracts, the structuring and implementation of legal policies/guidelines and working with boards of directors to provide legal guidance on international transactions to include M&A, commercial agreements, strategic alliances and joint ventures.
Mr Lourens held a number of executive leadership positions including Director, Corporate Affairs and General Counsel at Campina, a $5 billion privately held organization, and Royal Gist Brocades where he played a lead role in the sale of the company to DSM N.V.


Thomas Winkler
President Brand & Performance Textile Specialties

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Mr Winkler has been in the textile industry for almost 30 years, working for a variety of German textile companies before joining Sandoz, later Clariant, in 1987 as Head Product Management Textile Chemicals.
In 1992, he was appointed Business Unit Head Textile Chemicals Germany from which he transferred to Business Unit Head, Textile Chemicals for the East Asia Region in 1996. In 2005, he served as Global Head Product Management and Marketing Textile. In January 2006, he was appointed Head of the Business Unit Textile Chemicals.
Mr Winkler became President Textile Specialties and Asia at Archroma after Clariant’s textile business transferred to Archroma in October 2013, and he is President Brand & Performance Textile Specialties and Innovation since August 2015.


Valerie Diele-Braun
President Packaging & Paper Specialties, and
Coatings, Adhesives & Sealants

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Valerie Diele-Braun joined Archroma in early 2014 as Head of Strategic Marketing. She became President Paper Solutions and EMEA in August 2014, and she was appointed President Paper Solutions & Emulsion Products in August 2015.
Prior to joining Archroma, Ms. Diele-Braun was Head of Sales and Product Management for the Personal Care Division of DSM Nutritional Products. Previously, she was Managing Director of her own consulting company, focusing on delivering world-class strategies for B2B and B2C clients.
Earlier in her career she held the post of Vice President Global Key Account Management for Quest International which later became part of Givaudan.

Valerie Diele-Braun

Miguel De Bellis
President Region Americas

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Miguel de Bellis joined Archroma as President Emulsion Products and Americas in April 2014. He is President Region Americas since August 2015.
He joined from Endura Partners, a management consulting company operating in LATAM.
Before that, Miguel de Bellis worked for most of his career with Croda in Brazil, where his last appointment was President Specialities Latin America. Earlier in his career, he held several sales and marketing positions in Brazil and in South America.
A Brazilian National, Miguel de Bellis holds a Degree in Business Administration from FMU Faculdades Metropolitanas Unidas.


Oliver Schmidt
President Region Asia

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Oliver Schmidt first joined Sandoz (later Clariant and Archroma) in Austria in 1994 as a Textile Chemicals Product Manager for East Europe & Austria. Since then, he has held several roles in our textile business in Europe and Asia.
In 2011, Mr Schmidt transferred to the new textile business headquarters in Singapore as Head Global Commercial Product Management & Global Pricing, and in 2013, he became Regional Head of Textile Specialties Asia Pacific when the business transferred to Archroma.
In August 2015, Mr Schmidt was appointed in his current role as President Region Asia, member of the Leadership Team of Archroma.
A German National, Mr Schmidt holds a Textile Engineer diploma from Technical University Niederrhein, with majors in textile and clothing engineering and textile finishing.

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Beate Plueckhan
President Region Europe, Middle East & Africa (EMEA)

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Beate Plueckhan is President Region EMEA, since September 2016.
She started her career with Hoechst in Frankfurt, Germany. In 1997, she joined Clariant, when Clariant acquired Hoechst’s textile chemicals business. There she gathered in-depth experience in marketing and sales roles, including as Head of Global Marketing, Apparel & Interior, from 2005 to 2010, as well as Head of Sales roles in regional or sub-regional areas in Europe.
In 2013, Ms Plueckhan joined Archroma when the company acquired Clariant’s textile business. She was appointed as Head of Sales, Cluster Europe, Textile Specialties Business, in August 2015, and Head of Sales Textile Specialties and Emulsion Products for DACHEE in January 2016, a position she has held with success until being appointed to her current role.
Ms. Plueckhan holds a Diploma in Textile Engineering from Fachhochschule Kaiserslautern, Germany.


Lütfü Okman
Vice President Group Projects and Business Development

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Lütfü Okman joined Archroma on July 1, 2015 from BASF.
He was born in Turkey in 1968. He holds a M.B.A. from the Canterbury Business School at the University of Kent, UK, and a bachelor’s degree in civil engineering from the Istanbul Technical University.
Mr Okman gained extensive experience gained in Sales & Marketing roles with multinational companies such as Işıklar Group, 3M and Wacker Chemie Gmbh, and with BASF from 2004. In 2011, he became Vice-President of Global Business Management, Textile Chemicals Unit, and member of the Global Management Team of the Performance Chemicals division, based in Singapore, a position Mr Okman held until he joined Archroma. Mr Okman was President Region Europe, Middle East & Africa (EMEA) from August 2015 to August 2016, until he was appointed to his current role in September 2016.

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