Sworn of the Dying Light
Bertramas is a default teacher and master for new Dragons. This is mostly because as a Sworn of the Dying Light it is his responsibility to improve and research new mysteries and coils. Many students of his have died in his experiments.
His recent research focuses on spirits and other ephemeral beings.
However, not all of his time is focused on studies. He has quite a few ghouls within the morgues of the city and he makes sure that any supernatural corpses are registered as mundane deaths in Hartford.
Thus, he is also of great value to the city, not only preserving the masquerade but being able to make bodies disappear as favors.