Brian Altman is a lawyer and an associate at Zane Specter Litt.
He is first seen when Louis enters the bullpen to assign the associates tasks. He is urged by a fellow associate, Stephanie, to ask for two days off and when pressed as to why, he reveals he is going to be a father. Louis turns him down before proceeding to yell at him. After he worked with Louis, Louis came to his home and helped him with his newborn.
In Right-Hand Man, Brian learns that Katrina wanted to fire him. However due to Louis not wanting to get rid of him, he was able to stick around as he helped Katrina.