Johns Manville Executive and Leadership Team

May, 2026

Leadership Overview

Johns Manville has 10 executives leading key functions including strategy, information technology, human resources, research and development, and product line leadership.

Driven by innovation, Johns Manville manufactures insulation, roofing materials, and engineered products, shaping the future of building materials with a commitment to sustainable solutions and market leadership.

Leadership Roles at Johns Manville

  • President & Chief Executive Officer - Robert Wamboldt
  • President, Jm Engineered Products - Phillip Kapaona
  • President - Janet Myhre
  • President, Jm Engineered Products - Jonathan Vasuta
  • President, Insulation Systems - Gregory Clarke
  • President, Roofing Systems - Joseph Smith
  • Vice President & Chief Information Officer - John Shellenberger
  • Chief Human Resources Officer - Eric Cremer
  • Vice President, Research & Chief Technology Officer, Development - Scott Coons
  • Chief People Officer - Michael Green
  • Robert Wamboldt - President & Chief Executive Officer

    Robert Wamboldt, the President & Chief Executive Officer at Johns Manville, directs the company's overarching strategy and operational execution. Wamboldt guides the organization's expansion in insulation, roofing materials, and engineered products, aligning all business units with core objectives. This leadership role involves fostering innovation across all departments, ensuring Johns Manville maintains its market position through advanced manufacturing techniques and sustainable product development. The Chief Executive Officer drives critical decisions impacting global operations and financial performance, overseeing the strategic direction for all divisions. By championing a culture of excellence, Robert Wamboldt ensures the company consistently delivers high-quality solutions to its diverse customer base across North America and beyond. The focus remains on driving profitable growth and enhancing shareholder value through disciplined execution and strategic foresight.

    Phillip Kapaona - President, Jm Engineered Products

    Phillip Kapaona, the President, Jm Engineered Products at Johns Manville, directs the strategic growth and operational performance of the engineered products division. Kapaona oversees the development, manufacturing, and market delivery of specialized engineered solutions, ensuring alignment with customer needs and industry standards. This leadership role involves driving innovation within the engineered products segment, expanding market reach, and optimizing production processes for maximum efficiency. The President, Jm Engineered Products champions a customer-centric approach, fostering strong relationships with clients across diverse industrial sectors. By focusing on technological advancement and product differentiation, Phillip Kapaona ensures this division contributes significantly to Johns Manville's overall market leadership. Strategic initiatives aimed at enhancing product capabilities and exploring new application areas are central to this executive's mandate.

    Janet Myhre - President

    Janet Myhre, the President at Johns Manville, holds significant responsibility for driving strategic initiatives and operational excellence across key business segments. Myhre focuses on enhancing market penetration and profitability for the company's core product offerings, including insulation and roofing systems. This leadership position involves overseeing cross-functional teams to ensure seamless execution of business plans and achievement of financial targets. The President champions initiatives that foster innovation and operational efficiency, critical for maintaining Johns Manville's competitive edge. By guiding strategic decision-making and resource allocation, Janet Myhre plays a vital role in the company's sustained growth and market leadership. The focus remains on delivering superior value to customers and stakeholders through robust product development and effective market strategies.

    Jonathan Vasuta - President, Jm Engineered Products

    Jonathan Vasuta, the President, Jm Engineered Products at Johns Manville, leads the strategic direction and operational execution for the engineered products business unit. Vasuta oversees the development and delivery of advanced engineered solutions, focusing on market expansion and technological innovation within this specialized segment. This executive role involves driving performance improvements, optimizing manufacturing processes, and ensuring product quality meets rigorous industry demands. The President, Jm Engineered Products champions strategic partnerships and customer collaborations to identify new market opportunities and enhance product offerings. By fostering a culture of continuous improvement, Jonathan Vasuta ensures the engineered products division remains a key contributor to Johns Manville's overall success. Strategic planning for product diversification and market penetration is central to this leadership position.

    Gregory Clarke - President, Insulation Systems

    Gregory Clarke, the President, Insulation Systems at Johns Manville, directs the strategic vision and operational management for the company's insulation business. Clarke oversees the development, manufacturing, and distribution of a comprehensive range of insulation products, ensuring market leadership and customer satisfaction. This critical role involves driving innovation in insulation technology, enhancing product performance, and expanding market reach across residential, commercial, and industrial sectors. The President, Insulation Systems champions initiatives focused on sustainability and energy efficiency, aligning product offerings with global environmental goals. By optimizing supply chain logistics and production efficiency, Gregory Clarke ensures the consistent delivery of high-quality insulation solutions. Strategic planning for product portfolio expansion and market penetration is central to this executive's responsibilities.
    Gregory Clarke

    Joseph Smith - President, Roofing Systems

    Joseph Smith, the President, Roofing Systems at Johns Manville, leads the strategic direction and operational execution for the company's roofing business. Smith oversees the development, manufacturing, and market deployment of advanced roofing materials and systems, focusing on innovation and customer value. This executive role involves driving market share growth, enhancing product performance, and ensuring operational efficiency across the roofing division. The President, Roofing Systems champions strategic initiatives to expand the product portfolio and strengthen customer relationships within the construction industry. By fostering a culture of excellence and continuous improvement, Joseph Smith ensures the roofing systems division remains a key contributor to Johns Manville's overall success. Strategic planning for product innovation and market expansion is central to this leadership position.

    John Shellenberger - Vice President & Chief Information Officer

    John Shellenberger, the Vice President & Chief Information Officer at Johns Manville, architects the company's technology infrastructure and digital transformation initiatives. Shellenberger oversees the integration of advanced IT systems to support manufacturing, supply chain, and customer engagement across all product lines. This critical role ensures robust cybersecurity measures and data integrity, safeguarding company assets and intellectual property. The Chief Information Officer drives the adoption of new technologies that enhance operational efficiency and product innovation, directly supporting the development of insulation, roofing, and engineered products. By optimizing digital workflows, John Shellenberger enables seamless collaboration among teams and facilitates data-driven decision-making throughout the organization. Strategic investments in cloud computing and enterprise resource planning systems are central to this leadership, ensuring scalability and agility in a competitive market.
    John Shellenberger

    Eric Cremer - Chief Human Resources Officer

    Eric Cremer, the Chief Human Resources Officer at Johns Manville, shapes the company's talent strategy and cultivates a high-performance organizational culture. Cremer directs all human resources functions, including talent acquisition, employee development, compensation, and benefits, ensuring alignment with business objectives for manufacturing and product development. This leadership position focuses on fostering an inclusive and engaging work environment that supports the company's mission in insulation, roofing, and engineered products. The Chief Human Resources Officer plays a pivotal role in organizational design and change management, ensuring the workforce is equipped to meet evolving market demands. By implementing robust HR policies and programs, Eric Cremer drives employee engagement and retention, critical for sustained operational excellence. Strategic workforce planning and leadership development are key priorities, ensuring a pipeline of skilled professionals across all levels of the organization.
    Eric Cremer

    Scott Coons - Vice President, Research & Chief Technology Officer, Development

    Scott Coons, the Vice President, Research & Chief Technology Officer, Development at Johns Manville, spearheads innovation and technological advancement across the company's product portfolio. Coons leads the research and development efforts focused on creating next-generation insulation, roofing materials, and engineered products, driving competitive advantage through scientific discovery. This executive role involves overseeing the entire product lifecycle from ideation to market-ready solutions, ensuring cutting-edge performance and sustainability. The Chief Technology Officer, Development champions a culture of scientific inquiry and technological exploration, fostering collaboration between R&D teams and manufacturing operations. By directing strategic investments in new materials and processes, Scott Coons ensures Johns Manville remains at the forefront of industry innovation. This leadership is crucial for developing solutions that meet stringent performance standards and address emerging environmental challenges.

    Michael Green - Chief People Officer

    Michael Green, the Chief People Officer at Johns Manville, drives the strategic vision for human capital management and organizational effectiveness. Green oversees the development and implementation of comprehensive people strategies that support the company's growth in insulation, roofing, and engineered products. This role focuses on enhancing employee experience, fostering leadership capabilities, and ensuring a robust talent pipeline across all business units. The Chief People Officer champions initiatives that promote diversity, equity, and inclusion, creating a workplace where all employees can thrive and contribute to their fullest potential. By aligning people practices with business goals, Michael Green ensures that Johns Manville attracts, develops, and retains top talent. Strategic workforce planning and talent management are central to this executive's responsibilities, underpinning the company's long-term success and operational resilience.

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    Frequently Asked Questions Regarding Johns Manville Top Executives and Leadership Team

    Who leads Johns Manville?
    Johns Manville is led by Robert Wamboldt (President & Chief Executive Officer), along with executives such as Phillip Kapaona (President, Jm Engineered Products) and Janet Myhre (President).
    Who is part of Johns Manville’s executive team?
    The executive team of Johns Manville includes leaders such as Robert Wamboldt (President & Chief Executive Officer), Phillip Kapaona (President, Jm Engineered Products), Janet Myhre (President) and other senior executives.
    How many executives does Johns Manville have?
    Johns Manville has 10 executives leading key business areas.
    What roles are included in Johns Manville’s leadership team?
    The leadership team of Johns Manville includes roles such as President & Chief Executive Officer, President, Jm Engineered Products, President, President, Jm Engineered Products, President, Insulation Systems.