Blue Sky Agency has named Mariana Costa executive creative director. Costa joins Blue Sky from VMLY&R, where she was a group creative director. She previously served as a creative director at DDB, associate creative director at McCann Erickson and senior art director at FCB Chicago, working with such brands as Reebok, IAMS, Unilever, Verizon Wireless and Pfizer. In her new position, Costa will be responsible for leading Blue Sky’s creative team and collaborating closely with all departments to produce fully-integrated, cross-channel campaigns.