Menu
Trucks North America
Daimler Trucks North America

Operating Committee

A company with the scope of Daimler Trucks North America demands a leadership team with global expertise in all areas of the business. Finance, technology, marketing, human resources and more are all accounted for with the most qualified and experienced people at the helm. Their guidance, however, would mean nothing without the dedicated team of individuals motivated to reach their goals.

Martin Daum

President & CEO

As President and Chief Executive Officer since June 2009, Martin Daum has leadership and visionary responsibility for DTNA and its affiliated companies—Freightliner Trucks, Western Star Trucks, Thomas Built Buses, Freightliner Custom Chassis Corporation and Detroit Diesel Corporation.

In his most recent assignments, since 2002, Mr. Daum has served as a Member of the Executive Committee of Mercedes-Benz Trucks in Europe, Senior Vice President of Production for Mercedes-Benz Trucks, Head of the Unimog Special Vehicle Division and Head of Mercedes-Benz Trucks Finance. 

Mr. Daum has held several executive positions for DTNA, including General Manager of Finance at Sterling Truck Corporation in Willoughby, Ohio and Head of Controlling for the Light Truck Concept in Portland, Oregon.

With Daimler since 1987, Mr. Daum earned a Master’s degree in Economic Studies at Universitat Mannheim in 1985.

Dr. Wilfried Achenbach

Senior Vice President, Engineering & Technology

As Senior Vice President of Engineering and Technology, Dr. Wilfried Achenbach is responsible for all DTNA engineering activities for Freightliner and Western Star models. He oversees product and custom engineering, which consist of design, test, styling, analysis, compliance and planning functions.

Prior to joining the company in October 2010, Dr. Achenbach was responsible for Mechatronics Systems for Daimler AG in Stuttgart, Germany, focusing on electrical and electronics development for the next generation of European trucks. Concurrently, he led the mechatronics group within the global Daimler Trucks development organization.

Prior to moving to Daimler Trucks, Dr. Achenbach held various positions within the passenger car division, focused on driving dynamics and driver assistance, also spending several years in a senior executive position at Chrysler.

At the Johannes Gutenberg University in Mainz, Germany, Dr. Achenbach earned a Diploma in Physics and a Ph.D. in Nuclear Physics. In 1987, he joined Daimler AG’s passenger car division as a System Engineer in Advanced Development.

Friedrich Baumann

Senior Vice President, Aftermarket

Friedrich Baumann leads DTNA’s Aftermarket business including Parts Sales, Aftermarket Service Products, Detroit Remanufacturing, Aftermarket Supply Chain Management and Parts Distribution, Central Service, Aftermarket Marketing and Dealer and Distributor Network Management.

In 1993, Friedrich Baumann began his career with DTNA in the Finance & Controlling department and has since held several executive positions in Finance, Sales & Marketing, Procurement & Supply and Remanufacturing. In 2009, he was appointed Head of Global Strategy and Business Development for Daimler Trucks in Germany, and was then assigned the Managing Director role for the Power Generation JV between Rolls-Royce PLC and Daimler AG. In 2012, he returned to DTNA and was appointed to his current role.

Baumann studied Business with a minor in Industrial Engineering at the Universitaet of Stuttgart, Germany and also holds an MBA from Portland State University, Portland, OR.

Eileen Frack

General Manager, Human Resources

As General Manager of Human Resources, Eileen Frack leads all human resource management and labor relations activities for DTNA. Ms. Frack’s role includes providing leadership on policy development and implementation in the areas of talent management and acquisition, employee, organizational and management development, compensation, benefits, industrial relations, and health and safety programs.

Ms. Frack began her career with Daimler in 2005 as Director of the Office of Tax Affairs and International Trade Compliance. As an inaugural member of the first Diversity Steering Committee and after leading numerous cross-functional projects, in 2010 she became Director of Executive Management Development.

Ms. Frack has over 20 years of experience in financial and leadership development, including experience at NIKE and Kimberly-Clark. She earned a Bachelor’s degree in Business Administration from Oregon State University.

Richard Howard

Senior Vice President, Sales and Marketing

As Senior Vice President of Sales and Marketing, Richard Howard is responsible for the development of sales and marketing for Freightliner Trucks, the Detroit Components brand of on-highway engines, axles, transmissions, and DTNA’s proprietary components sales. He also oversees DTNA’s used truck operations and export sales.

Previously, as President and CEO of Daimler Financial Services, Africa and Asia Pacific, Mr. Howard was a member of the Daimler Financial Services AG Board of Management. Over a 20-year period, Howard built his career through the ranks of the Daimler Financial Services organization for both the Mercedes-Benz passenger cars and commercial trucks divisions. His assignments included working in the United States, the United Kingdom, Canada, Latin America, South Africa and Asia.

Prior to joining the company in 1993, Mr. Howard held several positions at companies in the United Kingdom, where he graduated from Aston University with a Master’s degree in Business Administration.

Roger M. Nielsen

Chief Operating Officer

As Chief Operating Officer since 2001, Roger Nielsen is responsible for the entire DTNA manufacturing network, as well as all levels of operations in quality, supplier management, logistics, and customer application engineering. In addition, he oversees Thomas Built Buses, Freightliner Custom Chassis Corporation and DTNA’s continuous improvement programs.

In 1986, Mr. Nielsen joined DTNA (then Freightliner Corporation) as an Industrial Engineer. In the early years of his career at Daimler, he served as Industrial Engineering Manager and then moved into operations as Plant Manager of the Gastonia North Carolina Parts Manufacturing Plant before becoming General Manager of Materials and Manufacturing Operations. In 1998, Mr. Nielsen transferred to Daimler-Germany, where he served as Director of Production Network Planning and Technical Clearing, within Daimler’s Commercial Vehicles Division. In January 2001, Mr. Nielsen was promoted to President of Freightliner Specialty Vehicles Group, where he was responsible for American LaFrance, Freightliner Custom Chassis Corporation, Orion Bus and Thomas Built Buses units.

Mr. Nielsen earned his Bachelor’s degree in Industrial Engineering from Oregon State University and is a registered professional engineer.

John O’Leary

Chief Financial Officer

As Chief Financial Officer, John O’Leary directs operative and strategic controlling, treasury, accounting, and tax functions for DTNA and its affiliated companies.

Previously, Mr. O’Leary was Senior Vice President of Aftermarket, with responsibility for support of all DTNA brands in the aftermarket, including parts sales and distribution, service, dealer network development and Detroit Diesel Remanufacturing. This role also involved oversight and development of DTNA’s Aftermarket Service Products, including extended chassis and engine warranties, telematics and contract maintenance.

Prior to January 2010, Mr. O’Leary served as President and Chief Executive Officer of Thomas Built Buses, where he oversaw sales, marketing, service, dealer operations, product planning, engineering and manufacturing functions for the world’s leading school bus company.

Mr. O’Leary has over 25 years of experience in a wide variety of financial roles for truck manufacturers and a high-tech electronics manufacturer. Mr. O’Leary earned his Bachelor’s degree in Accounting at Seattle University and completed the Executive Development Program at Northwestern University’s Kellogg Graduate School of Management.

Kelley Platt

Chief Diversity Officer & President of Western Star Trucks

In her role as the president of Western Star Trucks and the company's Chief Diversity Officer (CDO), Kelley Platt is responsible for executive oversight of Western Star Trucks, including sales, marketing, and the truck manufacturing plant in Portland, Oregon. With over 20,000 employees in North America, DTNA employs people from all walks of life. In her role as CDIO, Ms. Platt ensures alignment of diversity and inclusion strategies with organizational goals.

Ms. Platt joined Daimler Trucks North America in October 1989 as the Manager of Treasury Services. In 1997, she was promoted to Treasurer, responsible for cash and investment management, foreign exchange, and insurance. In 1998, she played a pivotal role in the company’s acquisition of Thomas Built Buses. In 2002, Ms. Platt added Tax and Customs responsibilities to her portfolio. In October of 2006, she was named the General Manager of Business Excellence with responsibility for the DTNA scorecard, TOS Indirect and Six Sigma. The introduction of the Truck Operating System to our indirect areas has served as a bench mark for the Daimler Truck Group. Ms. Platt was named President and CEO of Thomas Built Buses January 1, 2010 where she focused on increasing the company’s environmentally-friendly product line, growing its school bus business and enhancing aftermarket service and support.

Prior to joining DTNA, Ms. Platt was in commercial banking in Portland, Oregon and New York.

Ms. Platt has a Bachelor’s Degree in Economics from Colby College and a Masters of Business Administration from Duke University.