A lot of your organisation can be automated from within Slack by having slash commands trigger external scripts.
For one of my clients I’ve built an array of commands where some of them also have an array of optional arguments, that automates billing, job scheduling, and commands that allow their clients to check their balances. This also includes interactive messages (with buttons) and setting up automated email notifications.
Slack essentially becomes the command and control centre to manage a variety of external services.
I built a course on how to do the basics of this on Udemy.