Holman has announced a leadership transition for its North American fleet business, with Nick Caller named president of fleet and Mark Bryan promoted to fleet COO, effective Jan. 1, 2027.

Holman announced that Bob White, president of fleet, will retire after more than 37 years with the company. As part of the transition, Nick Caller has been promoted to president of fleet, while Mark Bryan has been named executive vice president and chief operating officer of fleet.

Both appointments take effect Jan. 1, 2027.

Nick Caller to Lead North American Fleet Business

Caller currently serves as executive vice president of sales and client relations. In his new role, he will oversee Holman's North American fleet business, including its continued growth and efforts to meet evolving customer needs.

Caller joined Holman in 2019 to lead its fleet business in the United Kingdom. He relocated to the United States in 2025 when he was named executive vice president of sales and client relations.

Earlier this year, Caller joined Holman's Craig Pierce for a Work Truck interview during Work Truck Week 2026. The conversation covered rising fleet operating costs, the importance of actionable data, and the growing role of safety and insurance expenses in fleet management.

Mark Bryan Named Fleet COO

Bryan, currently executive vice president of fleet operations, will oversee Holman's North American fleet operations as executive vice president and chief operating officer of fleet.

During his 20 years with Holman, Bryan has held several senior leadership positions, including leading the company's European operations and serving as president of Holman Small Business Solutions.

Bob White Retires After 37 Years

White joined ARI, now part of Holman, in 1989 and has held several leadership positions throughout his career.

In 2011, Work Truck reported on White's promotion to senior vice president of fleet services, where he was responsible for vehicle remarketing, in-house call centers, and fleet service operations. He later became president of ARI in 2018.

"Bob has made an extraordinary contribution to Holman throughout his 37-year career, helping to shape our fleet business while earning the trust and respect of our people, customers, and industry," said Chris Conroy, CEO of Holman. "We are deeply grateful for his leadership and the lasting impact he has made on our organization."

Conroy also expressed confidence in the incoming leadership team.

"As we look to the future, Nick and Mark bring the experience, perspective, and commitment to our customers and people needed to build on this strong foundation," he said.

Holman's Recent Executive Leadership Changes

The latest appointments follow broader executive leadership changes announced by Holman in June 2025. At that time, Pete Dondlinger was named president and chief operating officer, overseeing Holman's commercial businesses, including fleet management, upfitting, powertrain distribution, vehicle equipment manufacturing, and insurance. Kristina Nicoles was also promoted to president and chief administrative officer, overseeing the company's corporate services.

The new fleet leadership appointments were announced Nov. 12, 2026