Whose job is employee engagement: HR, CEO or dedicated head of engagement?

Human Resources.

HRD job,  but if CEO Visits OUTLETS OR DEPARTMENTS and any areas CEO job is talk to grad3 Employees not to managers, ask them "how is work, do you have issues, are you getting salary on time, how is your managers, is there any thing we can do to improve, that's call EXTRA engagement  from Company.  

HR

Employee engagement is not just a job for HR; it must be owned by everyone in the business at whatever level they operate. It should be the lifeblood of the organisation, so it is felt in everything you and your employees do. And of course it must start at the top and filter through the organisation. The role of HR is to help managers maximise engagement with their teams

HR Job is employee engagement