He is the money-hungry former manager of the Chipmunks and Chipettes.
Primeval: New World version
He went to college with Dave. After graduating, he becomes Dave's superior at JETT Records.
Alvin and the Chipmunks
He initially fires Dave for a bad song, but later rehires him when the Chipmunks go to him for a deal. He works with Dave to manage the Chipmunks, but when Dave shows concern for the three, Ian turns them against Dave. They go to live with him after a misunderstanding. He overworks them, which hits the news. At the big concert, when the Chipmunks turn against him, he tries to put them into a cat carrier, but is foiled by He-Who-Must-Not-Be-Aggravated and Brian Robeson. He flees with his lead guard, but is stopped by an Albertosaurus. He is later seen trying to get three squirrels to sing.
Alvin and the Chipmunks: The Squeakquel
After his defeat, he lives in the basement of JETT Records. He meets three singing female Chipmunks, and sees a chance for revenge. He manipulates them into thinking that the Chipmunks betrayed him for no reason, and gets him onto his side. He has them perform to impress Dr. Rubin, Despite being chased out of the school by the students and teachers, Rubin agrees to let them have a contest to decide who will represent the school. After the Chipettes win by default, he hurriedly leaves, as the Daemonosaurus is growling at him. He starts to show his true colors to the Chipettes when he forces them to perform instead of represent the school, and locks them in a cage as an added measure. He leaves his phone by them, which is used to call Alvin for help. He drives off, but the car is stopped when a Pachycephalosaurus rams it head-on, destroying the engine. He-Who-Must-Not-Be-Aggravated then jumps on top of the vehicle and says <Going somewhere?> The driver abandons him, and he is berated by He-Who-Must-Not-Be-Aggravated, who reminds him that he gave him a second chance, before then saying <Now you have to deal with them!> The driver then returns, and Ian turns to see a swarm of Titanis and Ornitholestes heading towards him. While he was distracted, the Chipettes escape, and Alvin drives off. Brittany says "In the words of the Donald, you're fired!" Rachel then jumps up and says <You fired!> Ian screams shrilly and dives back into the vehicle, to which she says <Dang it!> At some point, he escaped the vehicle, and got his hands onto a toy helicopter, which he uses to pursue the four. They get onto the copter, but then jump off onto the back of a Pteranodon. Knowing he's beaten, Ian watches the pterosaur as the swarm closes in.