Sergeant Julia Richmond is the chief communication officer and a field operative for Section 20.
She is responsible for maintaining contact with other operatives in the field and all other transmissions that are relevant to their current assignments. Richmond sometimes goes into the field when she is needed.
In Season 2, Episode 10, She is injured in the attack on Section 20's mobile base in Budapest by Latif's Pakistani Militant Extremists.
In Season 3 and Season 4, Richmond has an advanced role in the field, as she goes out on assignments more often, probably due to the lack of Section 20 operatives.