Mangers' responsibilities cover helping employees to grow, providing relevant and developing feedback to the employees, and showing appreciation for the team's performance. Managers have close contact with the employees and must build good relationships with them.
Employees are obviously important in driving employee engagement. They should engage in meaningful relationships with their managers and teams and provide relevant and honest feedback when something is not working. Employees should take part in the development by adding creative solutions to their concerns.
HR should hold the teams accountable for their employee engagement initiatives. The department should help implement the right processes and tools for successful employee engagement and support the managers so they are able to include their employees and develop employee engagement.