Nowadays, most companies have some type of online marketing efforts. Whether it's organic or paid social media marketing, they're creating and sharing content that reflects their brand. Most companies understand that when it comes to employer brand, their employees are the front line. In order to keep your brand intact and continue putting the best foot forward, your employees need to be engaged with the content you're posting.
Here are some ways your employees can (and should) be sharing your company content:
If your employees aren't sure how to craft the best posts give them some examples. Feel free to provide them with some templates to follow (just make sure you make it very clear that they have to customize the posts or it'll be very obvious when everyone shares the same thing).
Also worth noting is that not all of your employees are going to be comfortable with sharing company content to their personal platforms. Don't force it. You don't want to lose top talent over some tweets.