Proterial Executive and Leadership Team

June, 2026

Leadership Overview

Proterial has 5 executives leading key functions including strategy, finance, technology, and business unit management.

Driven by material development, Proterial delivers products to a variety of industrial fields, leveraging a diversified business structure that fuses technologies to meet wide-ranging social needs and fuel group growth.

Leadership Roles at Proterial

  • Chairman of the Board & President & Chief Executive Officer - Sean Stack
  • Chief Financial Officer - Felix Valdez
  • Chief Financial Officer, BU, Specialty Steel Business Unit - Katsushige Kikuchi
  • 20 Top Management Chairperson & President - Kenichi Iwamoto
  • Chief Technology Officer - Hajime Murakami
  • Sean Stack - Chairman of the Board & President & Chief Executive Officer

    Sean Stack, the Chairman of the Board & President & Chief Executive Officer at Proterial, directs the overarching corporate strategy and global operations. Stack's leadership guides the company's diversified business structure, which is built upon advanced material development. This foundational strength allows Proterial to deliver critical products across numerous industrial sectors. The fusion of technologies under Stack's direction is the primary engine driving the Proterial Group's sustained growth and its capacity to address diverse societal requirements. Overseeing all executive functions, Sean Stack ensures strategic alignment with the company's mission to innovate and expand its market reach through material science expertise. This executive's purview encompasses setting long-term objectives and ensuring operational excellence across all business units, solidifying Proterial's position as a leader in its fields.

    Felix Valdez - Chief Financial Officer

    Felix Valdez, the Chief Financial Officer at Proterial, manages the company's financial health and strategic fiscal planning. Valdez oversees all financial operations, including budgeting, forecasting, and capital allocation, ensuring resources are effectively deployed to support Proterial's growth initiatives. This role is critical in maintaining the financial stability required for the company's diversified business structure, which relies on material development across various industrial fields. Felix Valdez's expertise ensures that financial strategies align with the technological fusion driving Proterial's market impact. By optimizing financial performance, Valdez directly contributes to the Proterial Group's ability to meet wide-ranging social needs and sustain its expansion. The Chief Financial Officer's responsibilities extend to investor relations and ensuring compliance with global financial regulations, thereby reinforcing Proterial's market credibility.

    Katsushige Kikuchi - Chief Financial Officer, BU, Specialty Steel Business Unit

    Katsushige Kikuchi, the Chief Financial Officer, BU, Specialty Steel Business Unit at Proterial, directs the financial strategy and performance specifically for the Specialty Steel Business Unit. Kikuchi manages the unit's fiscal operations, ensuring profitability and efficient resource allocation within this key segment of Proterial's diversified business structure. This role is vital for supporting the material development and product delivery within the specialty steel sector. Katsushige Kikuchi's financial oversight contributes directly to the unit's ability to meet specific industrial demands and social needs. The Chief Financial Officer, BU, Specialty Steel Business Unit's focus on financial discipline and strategic investment supports the overall growth of the Proterial Group by strengthening its specialized business foundations. Kikuchi's responsibilities include detailed financial analysis and reporting for the unit.

    Kenichi Iwamoto - 20 Top Management Chairperson & President

    Kenichi Iwamoto, the 20 Top Management Chairperson & President at Proterial, holds a pivotal leadership position overseeing strategic direction and top-level management functions. Iwamoto's role involves guiding the company's overall trajectory, ensuring that Proterial's diversified business structure, centered on material development, effectively serves a wide array of industrial fields. The Chairperson & President's leadership fosters the fusion of technologies that is the driving force behind the Proterial Group's growth. Kenichi Iwamoto's influence is critical in aligning corporate objectives with market demands and societal needs. This executive's responsibilities include setting the tone for corporate governance and strategic planning, ensuring Proterial's continued success and expansion in its operational domains. Iwamoto's tenure emphasizes robust management practices.

    Hajime Murakami - Chief Technology Officer

    Hajime Murakami, the Chief Technology Officer at Proterial, spearheads the company's technological innovation and material development efforts. Murakami directs research and development initiatives, focusing on the fusion of technologies that underpin Proterial's diversified business structure. This strategic focus enables the delivery of advanced products to a variety of industrial fields. The Chief Technology Officer's role is central to Proterial's ability to meet evolving social needs through cutting-edge material science. Hajime Murakami's leadership ensures that technological advancements are integrated seamlessly into the company's operations, driving the Proterial Group's growth trajectory. This executive's vision guides the exploration of new material properties and manufacturing processes, solidifying Proterial's competitive edge in the global market.

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    Frequently Asked Questions Regarding Proterial Top Executives and Leadership Team

    Who leads Proterial?
    Proterial is led by Sean Stack (Chairman of the Board & President & Chief Executive Officer), along with executives such as Felix Valdez (Chief Financial Officer) and Katsushige Kikuchi (Chief Financial Officer, BU, Specialty Steel Business Unit).
    Who is part of Proterial’s executive team?
    The executive team of Proterial includes leaders such as Sean Stack (Chairman of the Board & President & Chief Executive Officer), Felix Valdez (Chief Financial Officer), Katsushige Kikuchi (Chief Financial Officer, BU, Specialty Steel Business Unit) and other senior executives.
    How many executives does Proterial have?
    Proterial has 5 executives leading key business areas.
    What roles are included in Proterial’s leadership team?
    The leadership team of Proterial includes roles such as Chairman of the Board & President & Chief Executive Officer, Chief Financial Officer, Chief Financial Officer, BU, Specialty Steel Business Unit, 20 Top Management Chairperson & President, Chief Technology Officer.