Deborah Holland is the Chief of Security at Isla Sorna's Ranger Station. She has been in charge since its construction in 2001. She fills the niche of Robert Muldoon.
This is a description of her in the novella:
Deborah Holland had honey-blond hair, a warm, glowing smile, and the sweetest temperament of anyone with whom Alan had ever worked. She was almost thirty, but she looked like she was still in college.