Cas Holloway

Cas Holloway is Columbia’s Chief Operating Officer. As COO, Holloway serves as a member of the University Leadership Team and provides strategic oversight in key administrative areas, including Facilities and Operations, Human Resources, Columbia University Information Technology, Columbia Health, Columbia Technology Ventures, and climate and sustainability initiatives.

Holloway has had a distinguished career as a public servant, business leader, and entrepreneur. He joined the administration of Mayor Michael Bloomberg in 2006 as Chief of Staff to the Deputy Mayor for Operations. He then became Commissioner of the Department of Environmental Protection.

In 2011, Holloway was appointed Deputy Mayor for Operations, overseeing 11 mayoral agencies and offices, including the Departments of Sanitation, Buildings, and Environmental Protection; Citywide Administrative Services; and Labor Relations and Contracts, and assisting in the management of the FDNY, the Office of Emergency Management, and the Office of Management and Budget. He also oversaw the Mayor’s sustainability agenda, PlaNYC, and the City’s response to Hurricane Sandy, including the rebuilding of homes and neighborhoods most affected by the storm and the development of a long-term citywide resilience strategy.

From 2014 to 2019, Holloway worked at Bloomberg LP, where he served as Deputy COO and Global Head of Technical Operations. From 2019 to 2024, he held leadership roles at New York-based start-up companies Unqork and Shiftsmart. Holloway received his A.B. from Harvard University in Government and graduated from the University of Chicago Law School. He began his career at the New York City Department of Parks and Recreation.