Question: Who does the previous Vice President of Production at the animation studio that is owned and operated by Viacom, currently work for?

MTV Tres (stylized as tr3́s, taken from the Spanish word for the number three tres) is an American broadcast, digital cable and satellite television network owned by Viacom Global Entertainment Group, a division of the Viacom Media Networks subsidiary of Viacom.  Programming on Tr3s includes lifestyle series, customized music video playlists, news documentaries that celebrate Latino culture, music and artists and English-subtitled programming in Spanish, imported from the MTV España and MTV Latin America channels, as well as Spanish-subtitled programming from MTV.  The channel is targeted toward bilingual Latinos and non-Latino Americans aged 12 to 34.  The channel is currently headed by executive vice president and general manager Jose Tillan. <SEP>  He was formerly Vice President of Production at Nickelodeon Animation Studio, Vice President of Production at Hanna-Barbera, and Vice President of Production at DIC Entertainment.  He also served as a production supervisor for "Alvin and the Chipmunks".  He was also the executive in charge of production for various shows in the 1990s and early 2000s such as "Dexter's Laboratory", "CatDog", "Hey Arnold! Brian A. Miller is an American television producer and the current Senior Vice President and General Manager of Cartoon Network Studios in Burbank, California, having assumed the title in 2000. ", "The Angry Beavers", "ChalkZone", "", "The Powerpuff Girls", "Captain Planet and the Planeteers", "Adventures of Sonic the Hedgehog", "Cow and Chicken", "Johnny Bravo", and the first season of "SpongeBob SquarePants". <SEP> Sherry Gunther is an American producer known for her work in animation.  While at Klasky Csupo, Gunther worked on the television series "Duckman", "Rugrats", and early seasons of "The Simpsons", for which she won a Primetime Emmy Award in 1991.  She was made senior vice president of production at Hanna-Barbera Cartoons in 1995.  Under Hanna-Barbera President Fred Seibert she oversaw production of Turner Entertainment programs such as "Dexter's Laboratory", "Johnny Bravo", "The Real Adventures of Jonny Quest", and the "World Premiere Toons".  Sherry then went on to Produce Family Guy and to found Twentieth Television's first in-house Prime-Time animation studio, and produced countless Prime-Time pilots for Imagine Television, Touchstone Television, Twentieth Television, Fox, and Carsey Warner.  She also produced theatrical shorts of Looney Tunes for Warner Bros.  Sherry has received four additional Primetime Emmy nominations, Festival Awards, and a Humanitas Award.  a Daytime Emmy Award, two CableACE Award nominations, and a Humanitas Prize. <SEP>  The studio produces many of the network's most popular animated series, including "SpongeBob SquarePants", "The Fairly OddParents", "Teenage Mutant Ninja Turtles", "Harvey Beaks", "The Loud House", "Bunsen Is a Beast", and "Welcome to the Wayne".  It also produces programs for Nicktoons Network, Nick at Nite, TeenNick, and Nick Jr. as well. Nickelodeon Animation Studio, also known in Burbank as Nickelodeon Studios Burbank, is an American animation studio owned and operated by Viacom through its television network Nickelodeon.