DEI during hiring is things like:

• Making sure job postings are put up in spaces where minority populations have a similar chance to see them as majority populations. I.e. post at HBCU and Women’s colleges’ job boards, not just at the hiring manager’s alma mater.
• Making sure the application portal is accessible to those with disabilities

DEI during employment is things like:

• continuing unconscious bias training
• educating about the existence of diverse backgrounds and how that can benefit your team
• encouraging communication among your team members about how they approach problems, overcome obstacles, and achieve results

DEI is not (though the right commonly likes to use it this way):

• A slur for non-white male presenting people
• A diversity hire
• A socially acceptable term in lieu of the n-word