Construction equipment manufacturer Caterpillar announced Dr. Lou Balmer-Millar will assume responsibility for the chief sustainability officer role in addition to her current authority as senior vice president of the large power systems division within the energy and transportation segment.

Balmer-Millar succeeds Julie Lagacy, who was Caterpillar’s first chief sustainability and strategy officer and is retiring Feb. 1, 2023, after nearly 35 years of service. Balmer-Millar will work with Lagacy to transition to the role in the first quarter of 2023.

In her capacity as chief sustainability officer, Balmer-Millar will report directly to Chairman and Chief Executive Officer Jim Umpleby.

Balmer-Millar has held several technical and business leadership positions of increased scope and responsibility over her 20-year career with Caterpillar. Prior to joining the company, she led materials and chemical engineering research efforts at the Environmental Molecular Science Laboratory of the Pacific Northwest National Laboratory.