To delete a team member in Decile Hub, go to Firm Settings, then click on Team. Scroll to the right until you see a trash icon next to the team member you want to remove. Click the trash icon to delete the team member.

For more details, see this Decile Base post: https://decilehub.com/base/8-hub_support/988-request-to-remove-team-member-completely-from-decile-team