The role that the CIO has a primary obligation to work with in order to ensure proper protection of data during and after the cloud migration is the Chief Information Security Officer (CISO). The CISO is the senior executive who is responsible for establishing, implementing, and maintaining the information security strategy, policies, and programs of the organization, and for ensuring the alignment and integration of the information security objectives and activities with the business goals and operations of the organization. The CISO is the role that the CIO has a primary obligation to work with in order to ensure proper protection of data during and after the cloud migration, as the CISO can provide the leadership, guidance, and expertise for the information security aspects of the cloud migration, such as the risk assessment, the security controls, the compliance requirements, the incident response, and the security monitoring of the cloud services . References: [CISSP CBK, Fifth Edition, Chapter 1, page 28]; [100 CISSP Questions, Answers and Explanations, Question 20].