DevOps security considerations

Consider the following scenario to apply that knowledge. A CISO of a large, local company has said that he/she has concerns about security when applications are built quickly using new methods like DevOps. For this discussion, cover the following DevOps security considerations in your initial post. What might be some reasons why he/she would have this opinion? Are his/her concerns justified? How would you convince him/her that DevOps processes can be secured?