This is the 2531st most frequent Russian word.
региональным
"Regional."
Here, 'региональным' is an adjective modifying 'развитием', indicating development that pertains to a specific geographical or administrative region.
Этот проект связан с региональным развитием.
This project is related to regional development.
In this case, 'региональном' is an adjective describing 'отделении', specifying that the company branch is situated in a particular region rather than being a headquarters or another form of office.
Он работает в региональном отделении компании.
He works in the regional branch of the company.
Here, 'региональные' as an adjective modifies 'проблемы', showing that the issues are specific to particular regions and not of a general nature.