|Portrayed by Mel Rodriguez|
|Occupation||Head of Campus security|
|At Greendale to...||...To work because "Running Wilde" was cancelled|
|“||What do I do if I see a crime?||”|
–Security guard Chang
|“||What a security guard does. Call a cop.||”|
Sgt. Nunez was in charge of security at Greendale Community College. He eventually decided to leave due to growing concerns about his own safety. Dean Pelton then promoted Ben Chang to his position. His first appearance was in the Season Three episode "Biology 101" and his last appearance was in "Competitive Ecology". He was portrayed by Mel Rodriguez.
After the craziness of the 2010-2011 year at Greendale, Dean Pelton decides to get serious about his responsibilities at school. He calls the campus security force led by Sgt Nunez into his office to discuss the monkey problem in the school's air vents. Nunez suggests they use monkey gas to take care of the problem, and the Dean gives them approval to go ahead with the idea. Nunez and his men are later seen using a canister of monkey gas called "Chimpan-Zzz's" in the school's air vents. They are unable to hit their intended target with the gas but do manage to inadvertently hit Jeff with it who was in the air vents chasing after Chang. Sgt. Nunez and his men are recalled back to Pelton's office before finding the monkey and receive some bad news. Not only wasn't the Dean able to pay for the monkey gas invoice but also due to budget cuts the school could no longer pay their salaries. The only incentive the Dean could offer them to stay on was vouchers for free classes. Two of the security guards turned in their badges immediately and resigned. Nunez himself opted to stay and grabbed one of the vouchers because he needed it to get his scuba certification.
He is later seen training his new recruit Ben Chang as a security guard. When Britta tries to protest the new Model U.N., Chang takes her into custody and brings her to Nunez. After determining that she is not a real threat, Chang reluctantly lets her go. Later, Britta throws a brick through the security office with a message attached. She tells them she is going to disrupt the Model U.N. competition being held in the cafeteria. Nunez tells Chang about his past experience dealing with a protesters back in the 80's. One in particular who kept giving him trouble incited a riot at the W.T.O and the real cops were called in to deal with it. The protester was choked out and Nunez always wondered if things might have ended better if he had been involved. He then sent Chang off with his blessing and a stun gun to deal with Britta.