NAC needs to work continuously every day. Create a plan for how you tie NAC into ongoing processes. Some example events or processes to consider include
New employees
Employee termination
Change of resource access
Endpoint policy changes
Identify the people whom you want to manage each function and delegate the job function to them. For example, you probably want to make sure that new employees get access to the network, so you may want to make network access a part of your new-hire processes in HR.