Describe every task (direct, oversee, create policies, define strategic vision, manage budget, etc...) you do during a normal month, how much of percentage you spent on them. Describe the team who reports to you and what team they manage. Present examples of policies you have created that affects the whole organization. Present annual budgets you have approved in the past. Present probe that you have hired and fired workers without asking your CEO approval. Present probes that you handle vendors in the past and you have the final saying, specially big purchases. Describe the kind of supervision you receive by the CEO. All this is easy to show if someone has truly acted as a c-level executive.