Chanmugam joined Kellanova—formerly known as the Kellogg Company—in 2013 and assumed his current role in 2022. Between 2023 and 2024, the MENAT and sub-Saharan Africa units have showcased business growth in double digits. Chanmugam is also a member of the American Chamber of Commerce in Dubai, and he sits on the boards of Multipro Singapore, and Tolaram Africa Food. He was previously chief financial officer for the Asia Pacific, Middle East, and Africa at Kellanova and has held senior management roles at Mondelēz International, Kraft Foods, Cadbury, and Procter & Gamble.