This members-only tutorial provides the steps to display entries of a team_member custom post type as a grid of featured image and title which when clicked opens a lightbox having the title, value of job title custom field, featured image, entry content and other custom fields like email and Linkedin links.
Team archive pageClicking on a team profile shows member info incl. custom fields in a lightbox
Step 1
Let us register a custom image size for the team member images.