MODX REVO. Services and specialists. How to connect them together?

Question

PHP

Hello everyone, I'm sitting doing a website on mods and I'm blunting something) can you tell me how to do it? in general, there are service categories (for each separate page) and there are service specialists (each also has a separate page). so how do you connect them together? on the service category page, specialists in this category should be displayed, and on the specialist page, which categories it belongs to
1 specialist can belong to several categories of services I
attach a diagram

Help whoever can)
thanks!

Answer 1

Make nested links to specialist pages from each service category.