|Higher Rank:||Executive Officer|
|Lower Rank:|| Counselor|
|[ Source ]|
The Chief Counselor is considered a member of the Senior Staff and is responsible for the crew in his or her department. He or she is often the Counselor with the highest rank and most experience.
Because of their training in psychology, technically the ship or facility's Counselor is considered part of Starfleet Medical. The Counselor is responsible both for advising the Commanding Officer in dealing with other people and races, and in helping crew members with personal, psychological, and emotional problems.
Qualified psychiatrists have served aboard starships since the 23rd century, although occasionally the role of chief medical officer and counselor were combined, with medical officers also having expertise in space psychology; an example of this is Doctor Leonard McCoy, of the USS Enterprise and USS Enterprise-A.
By the mid-24th century, starship and starbase crews included a dedicated counselor, who was responsible for the mental well-being of the crew and civilian staff. The position is considered vital enough that it warranted inclusion in the senior staff of the Federation flagship; in that instance at least, the ship's counselor also had a diplomatic role, advising the captain in first contact and other situations. Onboard most ships within the fleet, these diplomatic duties are delegated to a specialized diplomatic officer, though this is often at the captain's discretion.
As with the chief medical officer, the ship's counselor has the power to relieve other officers and crewmembers of duty if he or she feels that their patient is suffering from a condition that may hinder their ability to perform their duties effectively.
At the captain's discretion, the ship's counselor may be allowed to wear something other than their normal Starfleet uniform while on duty.