Board of Directors

  • Judy Altmaier
    Judy Altmaier
    Judy Altmaier
    Director

    Judy L. Altmaier has served as a director of Allison Transmission Holdings, Inc. since February 2019. Ms. Altmaier, served as the President of Exmark Manufacturing Co, a subsidiary of The Toro Company, a worldwide provider of innovative solutions for the outdoor equipment, from 2013 unt

    Director
  • Image
    Stan A. Askren
    Stan A. Askren
    Director

    Stan A. Asken has served as a Director of Allison Transmission Holdings, Inc. since March 2016. Mr. Askren, is currently CEO and Founder of Quiet Trail Advisors, a private, senior level strategy and lean business advisory practice. He also serves as an advisor and lean business consulta

    Director
  • Scott Barbour Headshot
    Scott Barbour
    Scott Barbour
    Director

    D. Scott Barbour has served as a Director of Allison Transmission Holdings, Inc. since May 2022. Mr. Barbour serves as the Chief Executive Officer and President of Advanced Drainage Systems, Inc., or ADS, a manufacturer of water management solutions in the stormwater and on-site septic

    Director
  • Christman_Phil.jpg
    Philip J. Christman
    Philip J. Christman
    Director

    Philip J. Christman has served as a director of Allison Transmission Holdings, Inc. since August 2022. Mr. Christman recently retired as President, Operations of Navistar, Inc., a leading manufacturer of commercial trucks, buses and engines, a role he held from May 2017 until March 2022

    Director
  • Image
    David C. Everitt
    David C. Everitt
    Director

    David C. Everitt has served as a director of Allison Transmission Holdings, Inc. since August 2014. Currently retired, Mr. Everitt, most recently served as Interim Chief Executive Officer of Harsco Corporation from February 2014 to August 2014. Prior to that, Mr. Everitt had been with D

    Director
  • Image
    Alvaro Garcia-Tunon
    Alvaro Garcia-Tunon
    Director

    Alvaro Garcia-Tunon has served as a Director of Allison Transmission Holdings, Inc. since January 2016. Mr. Garcia-Tunon, retired as the Chief Financial Officer of Wabtec Corporation, or Wabtec, a provider of products and services for the global rail industry, effective January 1, 2014.

    Director
  • David Graziosi
    David S. Graziosi
    David S. Graziosi
    Chairman & Chief Executive Officer

    David S. Graziosi has served as a director of Allison Transmission Holdings, Inc. since May 2018. Mr. Graziosi, serves as President and Chief Executive Officer of Allison, a position he has held since June 2018. Prior to that, Mr. Graziosi served as President, Chief Financial Officer an

    Chairman & Chief Executive Officer
  • Carolann Haznedar
    Carolann I. Haznedar
    Carolann I. Haznedar
    Director

    Carolann I. Haznedar has served as a Director of Allison Transmission Holdings, Inc. since November 2018. Ms. Haznedar, held various positions with E.I. du Pont de Nemours and Company from 1981 until her retirement in June 2016. Most recently, she served as Senior Vice President, Americ

    Director
  • Image
    Richard P. Lavin
    Richard P. Lavin
    Director

    Richard P. Lavin has served as a director of Allison Transmission Holdings, Inc. since March 2016. Mr. Lavin, served as President and Chief Executive Officer of Commercial Vehicle Group, Inc. or Commercial Vehicle, a leading global supplier of a full range of cab-related systems for the

    Director
  • Sasha Ostojic Final-2.jpg
    Sasha Ostojic
    Sasha Ostojic
    Director

    Sasha Ostojic has served as a director of Allison Transmission Holdings, Inc. since August 2022. Mr. Ostojic is a Venture Partner at Playground Global LLC, a venture capital firm specializing in early stage deep tech companies, a role he has held since April 2019, and serves as Interim

    Director
  • Perna.jpg
    Gustave F. Perna
    Gustave F. Perna
    Director

    General, United States Army (retired) Perna has served as a director of Allison Transmission Holdings, Inc. since August 2022. General Perna retired from the United States Army in July 2021 as the Chief Operating Officer of Operation Warp Speed, the Trump administration’s multi-billion-

    Director
  • Image
    Thomas W. Rabaut
    Thomas W. Rabaut
    Director

    Thomas W. Rabaut has served as a Director of Allison Transmission Holdings, Inc. since August 2007. Mr. Rabaut, currently serves as an Operating Executive for The Carlyle Group, a global alternative asset management firm, and has held that position since 2007. In that capacity, he has f

    Director
  • Image
    Lieutenant General (retired) Richard V. Reynolds
    Lieutenant General (retired) Richard V. Reynolds
    Director

    Richard V. Reynolds has served as Director of Allison Transmission Holdings, Inc. since November 2010. Lieutenant General, United States Air Force (retired) Reynolds, is owner and principal of the VanFleet Group, LLC, an aerospace consulting company, and has served in that capacity sinc

    Director
  • Krishna.jpg
    Krishna Shivram
    Krishna Shivram
    Director

    Krishna Shivram has served as a director of Allison Transmission Holdings, Inc. since August 2022. Mr. Shivram currently serves as Director of Ranger Energy Services Inc. since August 2017 and of Superior Energy Services Inc. since April 2021, both of which are oilfield service companie

    Director