Last June, Abraham announced plans to cut Channel 4's executive board from 14 members down to just seven, while also creating a greater sense of connection between the online and television teams.
Pritchard becomes the final notable new appointment in a position overseeing the monitoring of how audiences are consuming Channel 4 shows.
Abraham said that Pritchard will help collate, develop and interpret audience data to "inspire new ideas and maximise Channel 4's competitiveness as a media provider".
Previously, Channel 4 relied on surveys from a panel managed by the British Audience Research Bureau (BARB) to judge how well its programmes were being perceived.
Pritchard, who joined Channel 4 as director of strategy in 2008, will now study data gained from the Channel 4 website, 4OD on-demand service and other platforms to give a more accurate portrayal of viewer behaviours and preferences.