Beatriz Santiago is a graduate of the John Marshall Law School and licensed to practice since November 1996. She is currently employed at the Cook County Public Defender's Office, Juvenile Justice Division.

She is a past president of the Puerto Rican Bar Association and currently serves as Secretary. She is also on the boards of the Hispanic Lawyers Association of Illinois and Aspira Illinois.

She is a recipient of 2009 top 40 lawyers under 40 in Illinois.