A Cummins Inc. executive who had risen through the ranks over 28 years to lead the company’s largest business unit has resigned.

Dave Crompton, 51, was the former president of the company’s Engine business. Since December, following a company restructuring, Crompton served as president of the Power Systems business.

The Columbus man had served as an officer of Cummins for the past 10 years.

He is being succeeded by Norbert Nusterer, who had been vice president of Parts and Central Supply Chain Operations.

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Rich Freeland, president and chief operating officer of the Columbus-based Fortune 200 company, announced the changes Monday in an email sent to Cummins employees.

Freeland said Crompton left “to spend more time with his family and pursue personal interests.” Crompton’s official last day with the company will be Aug. 1, to provide a transition period, Cummins spokesman Jon Mills said.

Crompton joined Cummins in 1988 soon after graduating from Williams College in Williamstown, Massachusetts.

In a previous interview with The Republic, Crompton said an interest in and knowledge of diesel engines for boats drew him to the company. At the time, Cummins was looking for people with such a background, and he helped the company start its marine business, Compton said.

Crompton steadily progressed through Cummins’ ranks, notably in the engine business.

He served as vice president and general manager of the MidRange Engine business and vice president and general manager of the Engine business, in the process taking over the company’s Chrysler business and also leading the Cummins’ Heavy Duty, MidRange and Light Duty engine segments.

Crompton helped Cummins forge a relationship with Nissan in 2013 to produce a 5-liter V8 Turbo Diesel for the next-generation Nissan Titan pickup.

When Freeland became president of Cummins, Crompton succeeded him as president of the Engine business in 2014.

Crompton was integral in the company’s recent restructuring, helping bring together the Power Generation and High Horsepower segments to create the Power Systems business, Freeland said.

“Dave has made Cummins a better company each of the 28 years of his career. In his time at Cummins, Dave showed an ability to take on some of our toughest challenges and drive important improvements for our business,” Freeland said in the email.

Crompton, as a representative of Cummins, was among the organizers of the Mill Race marathon, which launched in 2013.

Nusterer, 47, originally from Austria, was an intern at Cummins in 1995 and joined the company full time in 1996.

“Norbert’s skills and experience make him a great fit to lead the Power Systems business,” Freeland said in the email.

Nusterer also has shown an ability to build and develop excellent teams, and be a champion of employees, Freeland said.

Nusterer has worked in multiple segments of the company, including the Engine business, Power Generation, Supply Chain and the New and ReCon Parts business.

“Most recently, Norbert led our work to integrate elements of Supply Chain operations companywide,” Freeland said.

In his new position, Nusterer reports to Freeland.

Nusterer has a bachelor’s degree from Vienna University of Economics and a master’s degree in business administration from the University of Michigan in Ann Arbor.

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Kirk Johannesen is assistant managing editor of The Republic. He can be reached at johannesen@therepublic.com or (812) 379-5639.