A graduate of Brooklyn College, Malzberg worked at 77 WABC for over twenty-five years in several capacities, as an overnight political talk show host, a sports commentator, and co-host of a regular afternoon show with Richard Bey. In 2004, Malzberg joined the staff of New York City radio station WWRL-1600 AM, where he co-hosted an early morning show with New York Daily News columnist Karen Hunter. In July 2005, the short-lived morning team of Hunter and Malzberg was disbanded as Malzberg left WWRL.
In 2006, Malzberg returned to WABC to broadcast brief sports commentary segments. Throughout his career, Malzberg has also served as a substitute talk show host (on radio and television) and political pundit on various cable news shows, such as Heartland (hosted by Republican Governor of Ohio John Kasich), Fox & Friends, Hannity & Colmes, The O'Reilly Factor, Dayside, and several other programs on the Fox News Channel and CNN. Malzberg has hosted and commentated on cable-news channel MSNBC, where he has substituted for both Monica Crowley and Joe Scarborough. He was a frequent contributor to the MSNBC show hosted by television personality Phil Donahue.
In May 2007, Malzberg replaced Lionel as an evening host on WOR in New York and on the nationally syndicated WOR Radio Network. The Steve Malzberg Show initially aired in the late night time slot, but aired live on the network from 4 to 6 PM ET Monday through Friday for most of the show's life. On Sept. 1, 2011, Malzberg announced on his personal web site that WOR did not renew his contract. Malzberg's slot was filled by former New York governor David Paterson.
- U.S. Public Records Index, Vols. 1 & 2 (Provo, UT: Ancestry.com Operations, Inc.), 2010.
- Edel, Raymond A. "AN ORIGINAL LEAVES THE WFAN TEAM", The Record (Bergen County), November 30, 2001. "Fair Lawn resident and WABC on-air personality Steve Malzberg is also slated to make an appearance."