Allison Transmission Executive and Leadership Team

July, 2026

Leadership Overview

Allison Transmission has 6 executives leading key functions including strategy, finance, people operations, legal, and operations.

Driven by innovation, Allison Transmission is dedicated to advancing propulsion technology for medium- and heavy-duty commercial and defense vehicles globally, shaping the future of efficient and sustainable mobility.

Leadership Roles at Allison Transmission

  • Chief Executive Officer & Chairman - David Graziosi
  • Chief Financial Officer - Scott Mell
  • Chief Financial Officer & Chief Operating Officer & Treasurer - G. Bohley
  • Executive Vice President, Chief Financial Officer and Treasurer - Allison Graziosi
  • Chief People Officer - Lorraine Parker-Clegg
  • Vice President, General Counsel & Secretary - Eric Scroggins
  • David Graziosi - Chief Executive Officer & Chairman

    David Graziosi, the Chief Executive Officer & Chairman at Allison Transmission, directs the company's global strategy and overall corporate governance. Overseeing all facets of the business, Graziosi ensures alignment with the mission to design, manufacture, and distribute advanced propulsion solutions. This leadership role involves driving innovation in fully automatic transmissions and electrified propulsion systems for medium- and heavy-duty commercial and defense vehicles. By focusing on market expansion across North America, Europe, Asia, Africa, and South America, David Graziosi solidifies Allison Transmission's position as the largest global manufacturer in its sector. The Chairman's oversight extends to fostering strong relationships with stakeholders and guiding the company's long-term financial health and operational excellence.
    David Graziosi

    Scott Mell - Chief Financial Officer

    Scott Mell, the Chief Financial Officer at Allison Transmission, manages the company's financial operations and strategic fiscal planning. Overseeing all aspects of financial reporting, treasury, and investor relations, Mell ensures robust financial health and transparency. This critical role involves guiding investment strategies for the development of fully automatic transmissions and cutting-edge electrified propulsion systems. By analyzing market trends and economic conditions across global operations in North America, Europe, Asia, Africa, and South America, Scott Mell supports sustainable growth and profitability. The Chief Financial Officer's expertise is vital in optimizing resource allocation and driving financial performance to maintain Allison Transmission's leadership in the medium- and heavy-duty vehicle market.
    Scott Mell

    G. Bohley - Chief Financial Officer & Chief Operating Officer & Treasurer

    G. Bohley, the Chief Financial Officer & Chief Operating Officer & Treasurer at Allison Transmission, directs both the financial strategy and the operational execution of the company's global manufacturing and distribution network. Overseeing production, supply chain management, and financial stewardship, Bohley ensures efficient delivery of fully automatic transmissions and electrified propulsion systems. This multifaceted role involves optimizing operational workflows and financial resource allocation across all regions, including North America, Europe, Asia, Africa, and South America. By integrating financial discipline with operational excellence, G. Bohley drives efficiency and cost-effectiveness in Allison Transmission's pursuit of market leadership. The Treasurer's responsibilities include managing capital and ensuring the company's financial stability.
    G. Bohley

    Allison Graziosi - Executive Vice President, Chief Financial Officer and Treasurer

    Allison Graziosi, the Executive Vice President, Chief Financial Officer and Treasurer at Allison Transmission, spearheads the company's financial strategy and capital management. Overseeing financial planning, reporting, and treasury functions, Graziosi ensures fiscal integrity and supports strategic growth initiatives. This key position involves guiding the financial aspects of developing and deploying advanced propulsion technologies, including fully automatic transmissions and electrified systems for global markets. By managing financial resources effectively across North America, Europe, Asia, Africa, and South America, Allison Graziosi contributes to the company's sustained profitability and market expansion. The Executive Vice President's financial acumen is crucial for maintaining Allison Transmission's competitive edge and investor confidence.

    Lorraine Parker-Clegg - Chief People Officer

    Lorraine Parker-Clegg, the Chief People Officer at Allison Transmission, leads the human capital strategy and organizational development initiatives. Overseeing talent acquisition, employee engagement, and culture cultivation, Parker-Clegg ensures a high-performing workforce dedicated to advancing propulsion technology. This vital role involves fostering an environment that supports innovation in fully automatic transmissions and electrified propulsion systems for medium- and heavy-duty vehicles worldwide. By developing comprehensive HR programs and policies, Lorraine Parker-Clegg strengthens the employee experience across global operations in North America, Europe, Asia, Africa, and South America. The Chief People Officer's focus on talent management is essential for Allison Transmission's continued success and its commitment to its workforce.

    Eric Scroggins - Vice President, General Counsel & Secretary

    Eric Scroggins, the Vice President, General Counsel & Secretary at Allison Transmission, provides strategic legal counsel and oversees corporate governance. Managing all legal affairs, Scroggins ensures compliance with regulations and mitigates risk across the company's global operations. This critical function involves advising on the development and deployment of advanced propulsion technologies, including fully automatic transmissions and electrified systems for commercial and defense vehicles worldwide. By safeguarding the company's legal interests and upholding ethical standards across North America, Europe, Asia, Africa, and South America, Eric Scroggins supports Allison Transmission's strategic objectives. The General Counsel's expertise is fundamental to maintaining the integrity and stability of the organization.

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    Frequently Asked Questions Regarding Allison Transmission Top Executives and Leadership Team

    Who leads Allison Transmission?
    Allison Transmission is led by David Graziosi (Chief Executive Officer & Chairman), along with executives such as Scott Mell (Chief Financial Officer) and G. Bohley (Chief Financial Officer & Chief Operating Officer & Treasurer).
    Who is part of Allison Transmission’s executive team?
    The executive team of Allison Transmission includes leaders such as David Graziosi (Chief Executive Officer & Chairman), Scott Mell (Chief Financial Officer), G. Bohley (Chief Financial Officer & Chief Operating Officer & Treasurer) and other senior executives.
    How many executives does Allison Transmission have?
    Allison Transmission has 6 executives leading key business areas.
    What roles are included in Allison Transmission’s leadership team?
    The leadership team of Allison Transmission includes roles such as Chief Executive Officer & Chairman, Chief Financial Officer, Chief Financial Officer & Chief Operating Officer & Treasurer, Executive Vice President, Chief Financial Officer and Treasurer, Chief People Officer.