It's possible that:
* The name is misspelled: Check for variations in the spelling of the name.
* He's a relatively unknown artist: His credits might be more obscure or found on smaller projects.
* He works behind the scenes: He might be a writer, producer, or director not credited onscreen.
To help me find the right person, could you provide any additional information:
* Year of projects: Do you know when these projects were released?
* Genre of projects: What kind of movies or television shows did he work on? (Comedy, drama, horror, etc.)
* Any other clues: Is there anything specific about his work you remember?
With more details, I might be able to find information about Jimmy Reddington's projects.