An assistant ship's counselor or assistant counselor was an assistant therapist position held by junior officers aboard Federation starship's or starbases. This position was directly below that of a full ship's counselor.
Ensign Ezri Tigan held such a position aboard the USS Destiny in 2375. Following her reassignment to Deep Space 9, her new commanding officer Captain Benjamin Sisko conferred withStarfleet Medical, and waived the rest of the training she required to become a full counselor with a commission rank of lieutenant junior grade. (DS9: "Afterimage")