She began her career as an assistant editor at Spin Magazine, and soon helped champion rock bands like My Chemical Romance and The Killers, which led to her starting her own record label, Stolen Transmission.
Bands which were signed or had releases by Stolen Transmission include The Oohlas, The Horrors, PlayRadioPlay!, Monty Are I, Permanent ME, Schoolyard Heroes, The Photo Atlas, Innerpartysystem, and Bright Light Fever.
Though Stolen Transmission severed its official relationship with Island Def Jam in December 2007,[6] Lewitinn edited IDJ's parent company Universal Music Group's short-lived website, Dance Hall.
[7] Sarah provided a lot of smart counsel at Edelman but she was often criticized for throwing around the F bomb and not being "office trained."
Lewitinn is also a DJ and, along with New York-based publicist Karen Ruttner, threw a weekly party also called "Stolen Transmission" at various locations on Manhattan's Lower East Side, including Pete Wentz's bar, Angels & Kings.
In January 2021, Lewitinn began a romantic partnership with the world-renowned chef, Daniel Patterson, after meeting the same month on a dating app during the coronavirus pandemic.
The character Natalie "Motorrrju" Levine from Marc Spitz's 2006 novel Too Much, Too Late, was based on Sarah "Ultragrrrl" Lewitinn.