[2] Chernuchin began his television career as a staff writer of the short-lived series Eddie Dodd in 1991.
He wrote the teleplay and co-wrote the story (with Michael Duggan) for the two part episode "The Torrents of Greed".
Chernuchin and Morgenstern were nominated for an Edgar Award for Best Episode in a TV Series in 1992 for writing "Sonata for Solo Organ".
Chernuchin and Balcer won an Edgar Award for Best Episode in a TV Series in 1993 for writing "Conspiracy".
[1] Also in 1993 Chernuchin and the production staff were nominated for the Emmy Award for outstanding drama series for their work on the third season.
He wrote or co-wrote a further nine episodes of the fourth season; "Discord", "Black Tie" (with Green), "Apocrypha", "Born Bad" (story with Sally Nemeth, teleplay by Terry Cafolla), "Breeder" (with Balcer), "Mayhem" (story with Balcer, teleplay with Green), "Wager" (story with Harvey Solomon, teleplay by Solomon and Kevin Arkadie), "Sanctuary" (with Fordes) and "Doubles" (with Balcer).
In 1994 Chernuchin and Fordes were nominated for the Humanitas Prize in the sixty minutes category for writing the episode "Sanctuary".
Also in 1994 Chernuchin and the production staff were nominated for the Emmy Award for outstanding drama series for their work on the fourth season.
He co-wrote the season premiere "Second Opinion" (with Jeremy R. Littman), "Competence" (with Mark B. Perry) and "House Counsel" (with Barry M. Schkolnick).
In 1995 Chernuchin and the production staff were nominated for the Emmy Award for outstanding drama series for their work on the fifth season.
In 1996, Chernuchin and the production staff were nominated for the Emmy Award for outstanding drama series for their work on the sixth season.
He co-wrote the story for the 1996 action movie Eraser with his Law & Order colleague Walon Green and Tony Puryear.
He co-wrote the teleplay for the episode "A Reverend Runs Through It" with retired police officer Edward Allen Bernero based on a story by Clark and show runner Steven Bochco.
He wrote the teleplay for the episode "Wild Irish Woes" from a story by Bochco, Clark, Finkelstein and Miclh.
The series was the first original drama to air on the TNT network and was canceled before completing its first season.
He wrote the episodes "2:00 p.m.–3:00 p.m." and "4:00 p.m.–5:00 p.m." In 2002, he rejoined the crew of Law & Order as an executive producer and writer for the series thirteenth season.
The series was created by Dick Wolf and developed by Chernuchin's frequent co-writer René Balcer.
He remained an executive producer and writer for the series fourteenth season of Law & Order in 2003.
He left the production staff (for the second time) after the fourteenth season but continued to occasionally write for the series.
The project focused on a precinct of police officers in New York and was devised as a pilot for a series.