Omya Executive and Leadership Team

May, 2026

Leadership Overview

Omya has 5 executives leading key functions including finance, chief executive officer (americas), president, president (americas), and president (omya performance polymer distribution (asia pacific)).

Driven by innovation, Omya produces industrial minerals and distributes specialty chemicals, serving major markets like forest products, polymers, building materials, and life sciences with a global reach.

Leadership Roles at Omya

  • Chief Executive Officer (Americas) - Rainer Siedler
  • Chief Financial Officer - Reem Matar
  • President - Charles-Etienne Houssa
  • President, Americas - Olav Bergset
  • President, Omya Performance Polymer Distribution (Asia Pacific) - Ramli Chan
  • Rainer Siedler - Chief Executive Officer (Americas)

    Rainer Siedler, the Chief Executive Officer (Americas) at Omya, spearheads strategic direction and operational execution across the North and South American markets. This executive role involves driving business growth, expanding market share, and ensuring the successful implementation of corporate strategies within the region. Siedler oversees all commercial activities, from sales and marketing to product development and customer relations, fostering strong relationships with key stakeholders. The Chief Executive Officer (Americas) champions innovation and operational excellence, aligning regional efforts with Omya's global mission to provide industrial minerals and specialty chemicals. Rainer Siedler's leadership ensures that Omya's presence in the Americas effectively serves the forest products, polymers, building materials, and life sciences sectors.

    Reem Matar - Chief Financial Officer

    Reem Matar, the Chief Financial Officer at Omya, directs all financial operations and strategic fiscal planning. Overseeing treasury, accounting, and financial reporting, Matar ensures robust financial health and compliance across the organization. This leadership role involves managing capital allocation, optimizing investment strategies, and driving profitability in alignment with Omya's global objectives. By analyzing market trends and economic indicators, Reem Matar provides critical insights that inform executive decision-making, safeguarding the company's assets and enhancing shareholder value. The Chief Financial Officer's purview extends to risk management and the implementation of financial controls, ensuring operational efficiency and sustainable growth across all business segments.

    Charles-Etienne Houssa - President

    Charles-Etienne Houssa, the President at Omya, directs overarching corporate strategy and global business development initiatives. This pivotal role involves setting the vision for the company's expansion and market penetration, ensuring alignment across all divisions and geographical regions. Houssa's responsibilities encompass fostering innovation, driving operational efficiency, and cultivating strategic partnerships that enhance Omya's competitive position. The President works closely with other senior leaders to navigate complex market dynamics and capitalize on emerging opportunities within the industrial minerals and specialty chemicals sectors. Charles-Etienne Houssa's leadership guides the company's commitment to delivering high-quality products and solutions to its diverse customer base worldwide.

    Olav Bergset - President, Americas

    Olav Bergset, the President, Americas at Omya, leads the strategic growth and operational management for the company's activities across the Americas. This executive function involves overseeing all business units within the region, ensuring the delivery of industrial minerals and specialty chemicals to key markets. Bergset focuses on enhancing customer engagement, optimizing supply chain logistics, and driving revenue growth through targeted market strategies. The President, Americas collaborates with global leadership to adapt corporate objectives to regional demands, particularly within the forest products, polymers, building materials, and life sciences industries. Olav Bergset's tenure is marked by a commitment to operational excellence and sustainable business practices throughout the Americas.

    Ramli Chan - President, Omya Performance Polymer Distribution (Asia Pacific)

    Ramli Chan, the President, Omya Performance Polymer Distribution (Asia Pacific) at Omya, directs the strategic expansion and operational oversight of the performance polymer distribution business throughout the Asia Pacific region. This leadership position involves managing sales channels, cultivating key client relationships, and ensuring the efficient delivery of specialty chemicals to the polymers market. Chan's focus is on driving market share growth, identifying new business opportunities, and maintaining Omya's reputation for quality and reliability in this dynamic territory. The President, Omya Performance Polymer Distribution (Asia Pacific) works to align regional operations with global product strategies, supporting the diverse needs of manufacturers in the Asia Pacific. Ramli Chan's expertise is critical in navigating the complexities of the regional market and achieving sustained commercial success.

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    Frequently Asked Questions Regarding Omya Top Executives and Leadership Team

    Who leads Omya?
    Omya is led by Rainer Siedler (Chief Executive Officer (Americas)), along with executives such as Reem Matar (Chief Financial Officer) and Charles-Etienne Houssa (President).
    Who is part of Omya’s executive team?
    The executive team of Omya includes leaders such as Rainer Siedler (Chief Executive Officer (Americas)), Reem Matar (Chief Financial Officer), Charles-Etienne Houssa (President) and other senior executives.
    How many executives does Omya have?
    Omya has 5 executives leading key business areas.
    What roles are included in Omya’s leadership team?
    The leadership team of Omya includes roles such as Chief Executive Officer (Americas), Chief Financial Officer, President, President, Americas, President, Omya Performance Polymer Distribution (Asia Pacific).