Neville Ivers was the former head of security at Pelvanida. He is an Iguana.
At some point before being employed at Pelvanida, he was a Las Vegas police officer. This taught him from experience that a draft horse usually beats a human in a fight. (Darwin's Soldiers)
Before the terrorist incident, he sent out a memo warning Pelvanida personnel that there had been reports of theft from the biological labs. This led Zachary Johnson to realize Keegan O'Neill had stolen his equine cell growth accelerants. (Darwin's Soldiers Drabbles)