Co-executive Producer is a credit in television. It is a senior producer role on a series and the holders answer directly to the Executive Producers. They typically take responsibility for a significant aspect of the production (for example the writing) and work with more junior producers on it.
The Newsroom's Co-executive Producers are Greg Mottola, Paul Redford, and Denis Biggs. Redford is a senior writer for the series. Mottola is a senior director for the series. Biggs has a background in television production and oversees production issues.