A&E has expanded its reality programming wing with three exec appointments. Drew Tappon is VP of nonfiction and alternative programming. Brad Holcman joins as senior director in the unit while Nicole Reed serves as director. Tappon comes to A&E from Warner Horizon Television. Holcman previously worked at Fox 21. Reed had been with Discovery Communications.CNN has tapped Amy Entelis as senior veepee of talent and content development, reporting to CNN worldwide managing editor Mark Whitaker. She joins the Turner cabler after more than 30 years at ABC and a stint at Sucherman Consulting Group. Ruben Mendiola has joined Comcast Cable as veep and g.m. of multicultural video services. He comes to the cable giant from Dish Network, where he was g.m. of Latino programming and Spanish business development. Martha Stewart Living Omnimedia has appointed three biz development exec and a finance exec. Russell Brown joins as senior veep of consumer products licensing while Claudio Goldbarg is senior veep of publishing and digital media operations. Charlie Tiersch has been tapped veep of business development and Colleen Nowers is associate veep of business development. Andrew Polsky has joined Spanish-lingo radio station owner SBS Interactive as veep of digital sales, based in Miami. Polsky previously worked in radio and TV sales for CBS.