Executive Officers

Troy Clarke
Troy Clarke

President and Chief Executive Officer

Troy A. Clarke assumed the role of president and chief executive officer of Navistar International Corporation on April 15, 2013, after serving as chief operating officer since August 2012. 

As COO, Clarke was accountable for all Navistar operations in North America and globally.  He assumed this role shortly after being named president, Truck and Engine, in July 2012.  Clarke joined Navistar, Inc. in  2010 as president of Navistar Asia Pacific, where he was responsible for leading the company’s growth initiatives in the region. He came to Navistar after a distinguished 35-year career at General Motors. 

At General Motors, Clarke most recently served as president of GM North America and GM group vice president.  Preceding that role, he spent two years as the president of GM Asia Pacific and GM group vice president. Clarke also held the role of GM group vice president of Manufacturing and Labor Relations, where he was responsible for North America vehicle manufacturing, vehicle operations, the metal fabricating division and labor relations.  Over the course of his career with GM, he held several additional leadership roles, including president and managing director of GM de Mexico and director of Manufacturing for GM de Mexico.

Clarke is a member of the board of directors of Fuel Systems Solutions.

Walter Borst
Walter G. Borst

Executive Vice President and Chief Financial Officer

Walter G. Borst is executive vice president and chief financial officer of Navistar International Corporation. He joined Navistar in August 2013 from General Motors Company, where he most recently was the chairman, chief executive officer and president of GM Asset Management, responsible for managing approximately $85 billion in assets. Previously, Borst was vice president and treasurer at GM from 2003 to 2010. He also served as CFO of Adam Opel AG in Ruesselsheim, Germany from 2000-2002. Prior to that time, he served in various treasury, controller, and financial operating capacities at GM.

Persio Lisboa
Persio V. Lisboa

President, Operations

Persio V. Lisboa has served as President, Operations of Navistar, Inc. since November 2014. Prior to holding this position, Mr. Lisboa served as the Senior Vice President, Chief Procurement Officer of Navistar, Inc. from December 2012 to November 2014, as Vice President, Purchasing and Logistics and Chief Procurement Officer of Navistar, Inc. from October 2011 to November 2012 and Vice President, Purchasing and Logistics of Navistar, Inc. from August 2008 to October 2011. Prior to these positions, Mr. Lisboa held various management positions within the company’s North American and South American operations.

William Kozek
William R. Kozek

President, Truck and Parts

William R. Kozek has served as President, Truck and Parts of Navistar, Inc. since November 2014. Prior to holding this position, Mr. Kozek served as President of North America Truck and Parts of Navistar, Inc. from June 2013 to November 2014.  Prior to joining Navistar, Inc., Mr. Kozek held various positions at PACCAR, including as its Vice President and General Manager of its Peterbilt division from January 2012 to June 2013, as Vice President, China from June 2011 to December 2011 and as Vice President and General Manager of PACCAR's Kenworth division from October 2008 to May 2011.  Mr. Kozek began his career as an accountant for Peterbilt in 1987, and served in a number of finance roles before moving into operations as a Parts District Manager for the Kenworth division in 1995. He spent the next 16 years at Kenworth moving through a number of key operational roles with increasing responsibility.

Steven Covey
Steven K. Covey

Senior Vice President, General Counsel

Steven K. Covey has served as Senior Vice President and General Counsel of NIC since September 2004 and Chief Ethics Officer of NIC from February 2008 to July 2014. Prior to holding these positions, Mr. Covey served as Deputy General Counsel of Navistar, Inc. from April 2004 to September 2004 and as Vice President and General Counsel of Navistar Financial Corporation from 2000 to 2004. Mr. Covey also served as Corporate Secretary of NIC from 1990 to 2000 and Associate General Counsel of Navistar, Inc. from 1992 to 2000. He joined the company in 1981.  Prior to joining Navistar, Covey was in private practice with the Chicago law firm of Reese and Covey.

William McMenamin
William V. McMenamin

President, Financial Services and Treasurer

William V. McMenamin has served as President, Financial Services and Treasurer of Navistar International Corporation since August 2015.  He has also served as President of Navistar Financial Corporation (“NFC”) since January 2013 and as President, Financial Services and Treasurer of Navistar, Inc. since August 2015. Mr. McMenamin served as Vice President, Chief Financial Officer and Treasurer of NFC from October 2008 to January 2013.   Prior to these positions, he served as Vice President of Strategy of NFC from May 2007 to October 2008, Vice President of Credit of NFC from April 2005 to May 2007, and Director of Corporate Finance of Navistar, Inc. from 2001 to 2005.   Prior to joining Navistar, Mr. McMenamin held various positions in finance and accounting with a human resources services company, a bank and a national accounting firm.

Samara Strycker
Samara A. Strycker

Senior Vice President and Corporate Controller

Samara A. Strycker has served as Senior Vice President and Corporate Controller of NIC since August 2014.  Prior to joining NIC, Ms. Strycker served as Regional Controller, Americas, of General Electric ("GE") Healthcare from July 2010 to July 2014 and prior to that position she served as Assistant Controller of GE Healthcare from September 2008 to July 2010.  Prior to joining GE, Ms. Strycker was employed at PricewaterhouseCoopers, LLP from 1993 to 2008. Ms. Strycker is a Certified Public Accountant.

Curt Kramer
Curt A. Kramer

Corporate Secretary

Since 2007, Curt A. Kramer has served as Navistar International Corporation’s corporate secretary; he is also associate general counsel and corporate secretary of Navistar, Inc.  As corporate secretary, Kramer is responsible for all corporate governance and Board administration functions. As associate general counsel, he oversees all legal aspects of Navistar’s securities, finance and merger and acquisition activity. Kramer joined Navistar in 2002 as an attorney and went on to serve as a senior attorney, senior counsel, and general attorney. Prior to joining Navistar, Kramer was in private practice.