ATI Executive and Leadership Team

September, 2026

Leadership Overview

ATI has 10 executives leading key functions including strategy, financial oversight, human capital management, and industrial operations.

Focused on delivering high-performance specialty materials for aerospace and defense, ATI drives global innovation through advanced manufacturing processes and complex component engineering to meet rigorous customer requirements.

Leadership Roles at ATI

  • Chief Financial Officer - Rob Foster
  • Senior VP, Finance & Chief Financial Officer - James R. Foster
  • Executive Vice President & Chief Financial Officer, Finance - Donald Newman
  • Mech. Maintenence TechUnion President - Karl Brendle
  • President, Ati Forged Products - Mark Sirianni
  • President - Trevor Giroux
  • Business Unit President - Lee Weber
  • President - Heather Simmons
  • Chief of Staff - Jamie Bishop
  • Senior Vice President and Chief Human Resources Officer - Karen Vickerman
  • Rob Foster - Chief Financial Officer

    Rob Foster, the Chief Financial Officer at ATI, manages the fiscal health and capital allocation strategies necessary for sustaining advanced manufacturing operations. Overseeing global financial planning, the Chief Financial Officer directs investment into high-performance material research and development. This role requires constant monitoring of market volatility within the oil, gas, and energy sectors to ensure long-term profitability. Rob Foster maintains rigorous control over cost structures, enabling the company to remain competitive in demanding international markets. By analyzing financial performance metrics, the Chief Financial Officer provides the board with actionable insights regarding growth opportunities. This leadership function supports the expansion of production capabilities by securing the necessary capital for infrastructure upgrades. Through disciplined financial management, the Chief Financial Officer ensures that the organization maintains a robust balance sheet while pursuing innovation in specialty materials.
    Rob Foster

    James R. Foster - Senior VP, Finance & Chief Financial Officer

    James R. Foster, the Senior VP, Finance & Chief Financial Officer at ATI, executes financial reporting and treasury functions to support the company's diverse industrial portfolio. By managing liquidity and risk, the Senior VP, Finance & Chief Financial Officer ensures that the organization maintains the financial flexibility required for capital-intensive manufacturing. This role involves coordinating with operational leaders to optimize working capital and improve margins across the automotive and electrical energy segments. James R. Foster oversees the integrity of financial systems, providing transparency to stakeholders and investors. By implementing robust internal controls, the Senior VP, Finance & Chief Financial Officer mitigates financial risks associated with global supply chain fluctuations. This leadership role drives the financial strategy that enables the company to invest in cutting-edge material science. Through precise fiscal oversight, the Senior VP, Finance & Chief Financial Officer supports the long-term sustainability of the business model.
    James R. Foster

    Donald Newman - Executive Vice President & Chief Financial Officer, Finance

    Donald Newman, the Executive Vice President & Chief Financial Officer, Finance at ATI, directs the strategic financial planning and analysis functions that underpin the company's market position. By evaluating the profitability of complex component manufacturing, the Executive Vice President & Chief Financial Officer, Finance ensures that capital is deployed toward the most high-growth industrial applications. This role involves managing investor relations and communicating the financial impact of technological advancements in specialty materials. Donald Newman oversees the integration of financial data across all business units to drive operational efficiency. By analyzing macro-economic trends, the Executive Vice President & Chief Financial Officer, Finance guides the organization through complex regulatory environments. This leadership position supports the company's commitment to innovation by ensuring that financial resources are aligned with long-term strategic goals. Through rigorous financial stewardship, the Executive Vice President & Chief Financial Officer, Finance secures the company's future in the global manufacturing landscape.
    Donald Newman

    Karl Brendle - Mech. Maintenence TechUnion President

    Karl Brendle, the Mech. Maintenence TechUnion President at ATI, represents the interests of the technical workforce responsible for maintaining critical manufacturing infrastructure. By facilitating communication between labor and management, the Mech. Maintenence TechUnion President ensures that maintenance protocols align with safety and production standards. This role involves advocating for the training and development of technicians who operate the complex machinery used in specialty material production. Karl Brendle oversees the implementation of maintenance schedules that minimize downtime and maximize the lifespan of industrial equipment. By fostering a collaborative environment, the Mech. Maintenence TechUnion President supports the operational continuity required for high-performance manufacturing. This leadership position ensures that the technical staff remains equipped to handle the demanding requirements of the aerospace and defense industries. Through proactive engagement, the Mech. Maintenence TechUnion President contributes to the overall efficiency and reliability of the manufacturing facilities.

    Mark Sirianni - President, Ati Forged Products

    Mark Sirianni, the President, Ati Forged Products at ATI, directs the operations and strategic growth of the forging division. By overseeing the production of complex components for the aerospace and defense sectors, the President, Ati Forged Products ensures that the company meets the stringent quality requirements of its customers. This role involves managing the technical teams responsible for advanced forging processes and material transformation. Mark Sirianni drives initiatives to improve manufacturing throughput and reduce waste in the production cycle. By aligning the division's capabilities with market demand, the President, Ati Forged Products secures the company's position as a leader in high-performance components. This leadership position requires deep technical knowledge of metallurgy and manufacturing engineering. Through the optimization of forging operations, the President, Ati Forged Products supports the company's mission to provide innovative solutions for the most demanding industrial applications.

    Trevor Giroux - President

    Trevor Giroux, the President at ATI, oversees the execution of corporate strategy across the organization's diverse industrial segments. By directing the operational focus toward high-performance materials, the President ensures that the company maintains its competitive advantage in the global market. This role involves coordinating with other executive leaders to align production capabilities with the evolving needs of the aerospace, defense, and energy industries. Trevor Giroux drives the implementation of innovative manufacturing solutions that enhance product quality and operational efficiency. By monitoring market trends, the President identifies opportunities for expansion and technological advancement. This leadership position requires a comprehensive understanding of the company's technical capabilities and market reach. Through the strategic management of business units, the President supports the company's commitment to delivering advanced materials that meet the most rigorous customer requirements.

    Lee Weber - Business Unit President

    Lee Weber, the Business Unit President at ATI, manages the operational performance and market strategy for a specific segment of the company's specialty materials portfolio. By focusing on the unique requirements of the medical and automotive industries, the Business Unit President ensures that the division delivers high-performance components that meet strict regulatory standards. This role involves overseeing the entire product lifecycle, from material development to final delivery. Lee Weber drives initiatives to enhance manufacturing precision and reduce lead times for key customers. By fostering innovation within the business unit, the Business Unit President supports the company's broader mission of providing advanced solutions for complex engineering challenges. This leadership position requires close collaboration with sales and engineering teams to ensure that product offerings remain aligned with market needs. Through targeted operational improvements, the Business Unit President contributes to the overall growth and profitability of the organization.

    Heather Simmons - President

    Heather Simmons, the President at ATI, leads the strategic direction of key business divisions to ensure the delivery of advanced specialty materials. By overseeing the integration of new technologies into the manufacturing process, the President drives the company's ability to meet the demanding requirements of the electrical energy and industrial sectors. This role involves managing the operational scale of the business to ensure consistent quality and performance across all product lines. Heather Simmons coordinates with the executive team to align resource allocation with long-term growth objectives. By fostering a culture of technical excellence, the President ensures that the organization remains at the forefront of material science innovation. This leadership position requires a focus on operational efficiency and market responsiveness. Through the strategic oversight of business operations, the President supports the company's mission to provide high-performance components for critical global industries.
    Heather Simmons

    Jamie Bishop - Chief of Staff

    Jamie Bishop, the Chief of Staff at ATI, coordinates cross-functional initiatives to streamline organizational efficiency. By aligning executive priorities with the broader corporate mission, the Chief of Staff ensures that internal resources support the production of specialty materials. This role involves managing high-level communications and facilitating decision-making processes across the global manufacturing footprint. Jamie Bishop maintains a focus on operational excellence, ensuring that strategic objectives remain synchronized with the needs of the aerospace and defense sectors. Through rigorous oversight of internal projects, the Chief of Staff optimizes workflows to enhance productivity. By bridging gaps between departments, the Chief of Staff fosters a culture of accountability and precision. This leadership position directly impacts the ability of the organization to scale complex component manufacturing while maintaining the high standards expected by industrial partners worldwide.

    Karen Vickerman - Senior Vice President and Chief Human Resources Officer

    Karen Vickerman, the Senior Vice President and Chief Human Resources Officer at ATI, directs talent acquisition and organizational development strategies across the global enterprise. By cultivating a workforce capable of handling complex metallurgical processes, the Chief Human Resources Officer ensures that the company retains a competitive edge in the specialty materials industry. This role involves designing comprehensive training programs that align with the technical requirements of the aerospace and medical sectors. Karen Vickerman oversees performance management systems that drive employee engagement and operational safety. By fostering a culture of innovation, the Chief Human Resources Officer supports the recruitment of specialized engineering talent necessary for maintaining high-performance standards. This leadership position integrates human capital strategy with business objectives, ensuring that the organization possesses the expertise required to execute large-scale manufacturing projects. Through strategic workforce planning, the Chief Human Resources Officer secures the human infrastructure needed for future growth.

    Frequently Asked Questions Regarding ATI Top Executives and Leadership Team

    Who leads ATI?
    ATI is led by Rob Foster (Chief Financial Officer), along with executives such as James R. Foster (Senior VP, Finance & Chief Financial Officer) and Donald Newman (Executive Vice President & Chief Financial Officer, Finance).
    Who is part of ATI’s executive team?
    The executive team of ATI includes leaders such as Rob Foster (Chief Financial Officer), James R. Foster (Senior VP, Finance & Chief Financial Officer), Donald Newman (Executive Vice President & Chief Financial Officer, Finance) and other senior executives.
    How many executives does ATI have?
    ATI has 10 executives leading key business areas.
    What roles are included in ATI’s leadership team?
    The leadership team of ATI includes roles such as Chief Financial Officer, Senior VP, Finance & Chief Financial Officer, Executive Vice President & Chief Financial Officer, Finance, Mech. Maintenence TechUnion President, President, Ati Forged Products.