deliberant
/ˌdɛl.ɪˈbɛr.ənt/Definitions
1. noun
One who deliberates or participates in deliberation, often in a formal or official capacity.
“The deliberant committee made a crucial decision that changed the course of the project.”
2. verb
To take part in deliberation or discussion, especially in a formal or official capacity.
“The city council deliberated on the new zoning laws for several hours.”