Cheryl Swiderski has been named to the new position of film and TV marketing coordinator for Zomba Music Services, which is expanding its Los Angeles office.

She previously worked for Geffen Records and Chameleon Records.

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John Dimling has been named prexy-chief operating officer of Nielsen Media Research, succeeding William Jacobi, who has been elected a senior VP of parent Dun & Bradstreet Corp.

Dimling has spent nearly his entire career in the TV business, having most recently served as exec VP-group director of marketing for Nielsen since 1988.

He joined the ratings company in 1985 from the Electronic Media Rating Council, where he served as exec director and chief exec officer.

In his new role, Jacobi will oversee NCH Promotional Services, Dun & Bradstreet plan services, Erisco and sales technologies.

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