David S. Graziosi - President & Chief Executive Officer

David S. Graziosi has served as a director of Allison Transmission Holdings Inc. since May 2018. Mr. Graziosi, age 52, joined Allison in November 2007. He currently serves as the President and Chief Executive Officer of Allison and has served in that capacity since June 2018. Prior to that, he served as President, Chief Financial Officer and Assistant Secretary from January 2016 to May 2018 and as Executive Vice President, Chief Financial Officer, Treasurer and Assistant Secretary from November 2007 to December 2015. Before joining Allison, between 2006 and 2007, he served as Executive Vice President and Chief Financial Officer of Covalence Specialty Materials Corporation. Prior to joining Covalence Specialty Materials Corporation, Mr. Graziosi held various positions in industry, including as Vice President of Finance Precursors and Epoxy Resins at Hexion Specialty Chemicals, Inc. from 2005 to 2006, Executive Vice President and Chief Financial Officer at Resolution Performance Products LLC from 2004 to 2005, and Vice President and Chief Financial Officer of General Chemical Industrial Products Inc. from 2000 to 2004. Prior to 2004, he served in various positions for Sun Chemical Group B.V, the Colgate-Palmolive Company and Arthur Andersen LLP. Mr. Graziosi is also a Certified Public Accountant and a Certified Information Systems Auditor (non-practicing). He earned a bachelor’s degree in business economics from the State University of New York and a Master of Business Administration from Rutgers University.

Rohan Barua - Vice President, North America Sales

Rohan Barua joined Allison Transmission as Vice President, North America OEM Sales in August 2018. Prior to joining Allison, Mr.Barua worked for 12 years at Cummins Inc., where he most recently served as General Manager - OEM Business, responsible for revenue growth and integrated business leadership of a global OEM. Prior to that, he held a number of roles at Cummins in strategy and market planning, global off-highway aftermarket, and regional aftermarket marketing and sales. Prior to Cummins, Mr. Barua worked in sales, marketing and business development in India as part of the Prudential group, and also served briefly with DaimlerChrysler. He holds a bachelor’s degree from the University of Calcutta, a post-graduate diploma in management from the Indian Institute of Management, and a Master of Business Administration from the Broad School at Michigan State University.

G. Frederick Bohley - Senior Vice President, Chief Financial Officer & Treasurer

Frederick Bohley serves as Senior Vice President, Chief Financial Officer and Treasurer, a position he has held since June 2019. Mr. Bohley joined Allison Transmission in 1991 in the Finance organization where he held positions of increasing responsibility. In 2001, Mr. Bohley joined Marketing, Sales and Service where he held the position of National Account Executive. In 2003, he relocated to Sao Paulo, Brazil as Director of Latin American Operations and he returned in 2006 as Director of International Marketing and Business Planning. In October 2007, following Allison’s divestiture from General Motors, Mr. Bohley rejoined Finance and was promoted to Executive Director of Financial Planning and Analysis, Pricing and International Finance. He added Investor Relations to his responsibilities in January 2013 and Business Planning in August 2014. He was promoted to Vice President, with the added responsibility of the treasury department, in March 2016 and became Treasurer in July 2017. Mr. Bohley was promoted to Vice President, Chief Financial Officer and Treasurer in June 2018 and he added Business Development to his responsibilities in December 2018. In 2020, Information Systems and Services also moved under his oversight. Mr. Bohley holds a bachelor’s degree in business, with majors in accounting and finance, from the Kelley School of Business at Indiana University.

Todd Bradford - Vice President, Business Development

Todd started his career with Allison in 2011 as Corporate Counsel, with a focus on Allison’s international and domestic business activities and commercial sales agreements. In 2015, Todd was promoted to Managing Director and Deputy General Counsel when the department was reorganized to improve our focus on supporting the business operations of Allison in a rapidly changing marketplace. In 2017, Todd was promoted to Executive Director. Todd holds a bachelor’s degree in business administration and information systems from Illinois State University, graduating Summa Cum Laude and with University Honors. Todd graduated Cum Laude from Loyola University School of Law in Chicago. In 2010 and 2011, Todd was named by Law & Politics Magazine as a Rising Star in corporate legal matters and mergers and acquisitions. In both 2014 and 2015, Todd was the recipient of Junior Achievements Indy’s Best and Brightest Award, which identifies the Top 100 professionals in Indianapolis under the age of 40.

Robert M. Clark III - Vice President, Corporate Development

Robert (Skip) Clark joined General Motors as a summer intern in manufacturing at Inland Division in Dayton, Ohio. He held a variety of roles in several GM Divisions, including Industrial Engineer, Manufacturing Engineer and business planning, focusing on global business development. From there, Skip joined Delco Electronics where he worked within the Marketing and Sales held the position of Area Manager for a circuit board assembly plant, and Superintendent of Production for the powertrain control modules. Subsequently, Skip helped establish Delco Electronics’ Asia Pacific Headquarters in Singapore and led Sales activities in North America for all Asian OEMs operating in the USA. Skip joined Allison Transmission in 2002 as a Product Team leader for the 3000/4000 Series™ Products. In 2003, he joined Marketing, Sales and Service as Regional Director - Europe, Middle East and Africa based in The Netherlands, and in 2004 was promoted to Executive, as Managing Director – Europe, Middle East, Africa and South America. In 2012, Skip was named Managing Director – Allison Transmission Asia-Pacific, based in Singapore. In 2016, he was promoted to Vice President, Marketing & Sales for Europe, the Middle East, Africa and Asia-Pacific. In July 2018, Skip repatriated to Indianapolis and assumed the role of Vice President, Business & Corporate Development. Skip holds a Bachelor of Science degree in Industrial Engineering from Purdue University, and a Master in Business Administration degree from the University of Virginia Darden School of Business.

John M. Coll - Senior Vice President, Global Marketing, Sales & Service

John Coll joined Allison as Senior Vice President, Global Marketing, Sales and Service in October 2016. Prior to joining Allison, Mr. Coll was Vice Present of Sales and Marketing at Gerdau Ameristeel U.S. from January 2015 to October 2016. Prior to that, Mr. Coll served fourteen years at Eaton Corp., most recently as Vice President of Global Marketing for the vehicle group from January 2011 to January 2015. Prior to that, he held a number of other roles at Eaton, including Director of Global Channel Marketing for Eaton Electrical, General Manager of Aftermarket and Vehicle Solutions for Truck Components and Vice President of Sales and Marketing for Truck Components. Prior to joining Eaton, Mr. Coll served thirteen years at Philips Electronics in a variety of sales and distributor relations roles. Mr. Coll earned a bachelor’s degree in business administration from West Virginia University and a master in business administration from the University of Pittsburgh.

Michael A. Dick - Senior Vice President, Operations & Purchasing

Michael Dick has served as Senior Vice President of Operations and Purchasing since January 2016, with worldwide responsibility for manufacturing, global supply chain, manufacturing engineering and facilities. He had most recently been Vice President of Purchasing, Supplier Quality and Manufacturing Engineering since August 2012. Mr. Dick joined Allison Transmission in July 2006 and previously served in two other key executive positions. As Executive Director of Operations and Plant Manager for the 1000/2000 Series™ manufacturing facility in Indianapolis, a position Mr. Dick held from July 2006 through December 2007, his team significantly improved in the manufacturing cost per unit, hours per unit, customer pulls and customer complaint parts per million (PPM). As Executive Director of Manufacturing Engineering, a position he held from January 2008 through July 2012, Mr. Dick and the manufacturing engineering team were responsible for the successful launch of the assembly plant in Chennai, India and the relocation of the 3000/4000 Series™ assembly operations to Szentgotthárd, Hungary. Prior to joining Allison, Mr. Dick worked for the New Venture Gear Corp. (a joint venture between General Motors and Chrysler) where he served as the Vice President and Division Manager. In this role, he and his team took a business that had been losing money for a decade and made it profitable. Mr. Dick holds a bachelor’s degree in mechanical engineering technology from Purdue University.

Thomas D. Eifert – Vice President, Program Management and Product Planning

Thomas Eifert began his career with General Motors in 1989 as a co-op student and served in a variety of roles with Delphi Automotive. He joined Allison Transmission in 1996 as part of Supplier Quality and a member of the 1000/2000 Series™ launch team. Over the course of his career, Mr. Eifert has worked in different areas of the business, including Purchasing, Business Planning, and Engineering. In 2007, as part of Marketing Sales and Service, he was promoted to Executive Director of Customer Support. In 2013, Mr. Eifert rejoined Engineering as the TC10® Product Team leader at launch. He then assumed a cross-functional leadership role to define, plan and implement product initiatives for On-Highway Products Team, the Controls System Team, and most recently, the Off-Highway Products Team. Mr. Eifert was promoted to Vice President, Program Management and Product Planning in April 2017. He graduated from the University of Dayton with a degree in mechanical engineering and earned an MBA from Butler University.

Randall R. Kirk - Senior Vice President, Product Engineering & Planning

Randall Kirk joined Allison in May 1976 and serves as Senior Vice President, Product Engineering and Program Management, a position he has held since August 2014. At the beginning of his career at Allison, he served in a number of roles with increasing responsibility in the Operations and Quality organizations, including Supervisor, General Supervisor, Production Superintendent, Quality/Reliability Manager, and a dual role as Manager of Manufacturing Engineering and Quality and Divisional Program Manager. From 1997 until 2001, Mr. Kirk assumed the responsibilities of Product Team Leader for several product lines. He then served as Director of Customer Support in Marketing, Sales and Service from 2001 until 2007. From 2007 until 2009, Mr. Kirk was Executive Director of the Transition Program Manager Office, leading a cross-functional team with responsibilities for the separation from General Motors. Following the divestiture in 2009, he was appointed as Vice President, Product Engineering before his promotion to Senior Vice President, Product Engineering and Product Teams in August 2014.

Ryan Milburn - Vice President, e-Mobility Engineering

Ryan Milburn started his career at Allison Transmission in 1990 as a cooperative education student. He is currently Vice President, Mechatronics & Controls Software. In this role, Ryan is responsible for leadership over all controls software and electrical/electronic components for all Allison products. Prior to being appointed to his current position in 2019, Ryan had served as Executive Director, Embedded Controls Systems. Prior to that, he served as Managing Director Europe, Middle East and Africa (EMEA) based in The Netherlands and was responsible for sales and marketing to OEMs and end-user customers in the EMEA market. He previously served as Vice President and Chief Information Officer where he was responsible for the Company’s global Information Technology systems, infrastructure and services. Prior to that, Ryan held the positions of Manager of Engineering & Product Development Systems and Manager of Information & Control Systems for the green-field launch of the Allison Transmission manufacturing facility in Baltimore, Maryland. At the beginning of his career, Ryan held roles of increasing responsibility in manufacturing automation and machine controls engineering in Allison’s Manufacturing Organization.

Ryan received his Bachelor of Science degree in Electrical Engineering and Computer Science from GMI Engineering & Management Institute (now Kettering University) as part of a co-operative education program with Allison Transmission.

Lorraine Parker-Clegg - Vice President, Human Resources, Chief People Officer

Lorraine Parker-Clegg joined Allison Transmission as Chief People Officer to lead the Human Resources function in October 2020. Most recently, Ms. Parker-Clegg served as Chief Human Resources Officer with Doncasters Group Ltd., an international manufacturer of high precision alloy components. Prior to Doncasters, Lorraine held leadership positions with Covidien and Medtronic (COV acquired by Medtronic). Her first assignment was as Vice President of HR in the Emerging Markets Division she then led the integration and development of the Asia Pacific human resources team, based in Singapore. Prior experience includes a global leadership role with the former B/E Aerospace Consumables Division in Florida and a 16-year tenure with Bristol-Myers Squibb Company. This included roles as Director of Talent Acquisition in New Jersey, Director of Human Resources in Paris, France, Director Human Resources in Prague, Czech Republic and the United Kingdom. Her career originated in sales following the completion of her Bachelor of Arts degree in Sports Studies at Sheffield Hallam University, followed by a Diploma in Personnel Management at Oxford Brookes University. Lorraine is a Chartered Fellow of the Institute of Personnel and Development.

Dana J.H. Pittard - Vice President, Defense Programs

Dana Pittard joined Allison Transmission in October 2015 as Deputy Vice President of Defense Programs. He was promoted to Vice President, Defense Programs in January 2016. In this role, he oversees Allison’s domestic and global defense business. Mr. Pittard previously served in the U.S. Army in the grade of Major General (2-Star) and retired after 34 years of active duty. He has commanded Armor and Infantry units at every level from platoon to division, including command of the 1st Armored Division. His service included multiple combat tours. Mr. Pittard brings a wealth of experience in combat vehicle technology and a deep understanding of the Department of Defense and congressional budget processes. Pittard holds a Bachelor’s degree from the U.S. Military Academy at West Point, a Master’s degree from the School of Advanced Military Studies at the U.S. Army Command and General Staff College, and a National Security Fellowship from the John F. Kennedy School of Government at Harvard University.

Paul A. Richardson - Executive Director, Quality and Engineering Operations

Paul Richardson joined Allison Transmission in June 1980 as a co-op student. Over the course of his career, he has held positions of increasing responsibility with various groups in Product Engineering, including Commercial Products, Military Applications, Advanced Engineering, and Embedded Controls. Prior to being promoted to his current position, Paul had served as Executive Director of Analysis, Development and Validation (ADV) Engineering and Engineering Services. Paul graduated from General Motors Institute (now Kettering University) in 1985 with a bachelor's degree in mechanical engineering. He earned a master's degree in mechanical engineering in 1991 and in business administration (MBA) in 2003, both from Purdue University.

Conrad Rockey - Vice President, Commercial Powertrain Engineering

Conrad Rockey started his career in 1981 as an intern at Allison Transmission. He is currently Vice President, Commercial Powertrain Engineering. In this role, Rockey is responsible for leadership over all conventional on-highway and off-highway products, which includes current product support, development of new features, new variants and new products.

Prior to being named to his current position in 2019, Rockey was Executive Director of 1000-9000 Series Product Engineering. He began his career at Allison as Reliability Engineer on the AT and MT Series products. He later held roles of increasing responsibility in Reliability and Product Engineering including Senior Product Engineer for both the 3000/4000 and 1000/2000 Series product groups, lead Engineer for the 4000 series uprate program and Manager of the 1000/2000 Product Engineering group and later added responsibility for the 3000/4000 series as well. He also served as Executive Director of On-Highway and Off-Highway Commercial Product Engineering.

Conrad holds a Bachelor of Science degree in Mechanical Engineering from Purdue University. He completed the Executive Leadership Program at the Northwestern Kellogg School of Business and holds a DFSS Green Belt and Shainin Red X/Green Y Problem Solving Certificate.

Heidi K. Schutte - Vice President, EMEA, APAC & South America Sales

Heidi Schutte began her career with Allison Transmission as an intern in 1991 and as a full-time employee in 1992 with the Aftermarket and ReTran® group in Marketing, Sales and Service. Following a transfer to General Motors’ Saturn Corp. in 1994, she returned to Allison in 2000 as a Marketing Brand Manager for the 1000/2000 Series™.  More recently, following positions of increasing responsibility, Ms. Schutte was promoted to Director of Regional Sales for North America in 2009 and Executive Director, Regional Sales in 2010. In 2014, she was named Executive Director, North American Sales as her role was expanded to include National Accounts. Later that year, Ms. Schutte was named Executive Director, North American Sales and OEM Accounts. She was promoted to Vice President in March 2016. Ms. Schutte holds a bachelor’s degree in business management from Purdue University.

Eric C. Scroggins - Vice President, General Counsel & Secretary

Eric Scroggins joined Allison as Vice President, General Counsel and Secretary in December 2007 and has served in that position since then. He is responsible for advising our Board and leadership team on legal and business matters, managing our legal affairs and overseeing our Export Compliance, Corporate Affairs and Communications and Internal Audit organizations. Prior to joining Allison, Mr. Scroggins served as General Counsel for Product Action International LLC and was an attorney with the law firm of Ice Miller LLP. Prior to joining Ice Miller LLP, Mr. Scroggins worked for the State of Indiana, serving in various roles with the Indiana State Personnel Department, including Deputy Director.

Teresa J. van Niekerk - Vice President,  Global Purchasing & Supplier Quality

Teresa van Niekerk joined Allison Transmission in October 2012 as Managing Director of Purchasing and was promoted to Executive Director of Purchasing in December 2014. Most recently, she was promoted to Vice President of Purchasing and Supplier Quality in January 2016. During her time at Allison, Ms. van Niekerk has spearheaded significant organizational restructuring efforts. These activities include complex contract management strategy, business case development and assessment, sourcing implementation, raw material management, formal supplier development agreements, and monthly accrual management. Prior to joining Allison, Ms. van Niekerk held operational responsibility for Navistar Truck Division’s purchasing group where she managed all areas of global and domestic sourcing, contract negotiations and procurement of commercial vehicle and automotive components, and engineered systems. She holds a bachelor’s degree in management from Indiana Wesleyan University.