The company, which has recently become embroiled in a personal data use scandal alongside Facebook, has helped organize political campaigns across the world.
The Board of Directors of Cambridge Analytica announced Nix's suspension on Tuesday after the Channel 4 broadcaster published its undercover investigation. The board stressed in the statement that Nix's comments seen in the broadcaster's report "do not represent the values or operations of the firm."
A Channel 4 reporter, posing as a potential client, learned from Nix about the company's political consultancy campaigns, including the 2016 US presidential election which resulted in Trump's victory.
Cambridge Analytica has also faced public outrage over the way it collected the data that it then used to direct its campaigns.
Last week, Facebook said it had suspended the accounts of Cambridge Analytica and its affiliate SCL Group after Dr. Aleksandr Kogan, a professor at the University of Cambridge, sent these firms data from Facebook users that was harvested through an application that used Facebook Login.
The social network stressed that Kogan obtained the information, which included profile details, such as liked content, in a legitimate manner, but then breached Facebook policy when he passed this data to a third party.
The committee urged Zuckerberg to respond by March 26.
Kogan told the BBC broadcaster that he was being used as a "scapegoat" by Facebook and Cambridge Analytica. The academic added that he had no idea the information his app collected would be used to help Trump.
Nix said that Cambridge Analytica did all the research for Trump's campaign, managed his digital and television strategies, and used their data to choose the appropriate course of action.
Nix described how easy it was to field the questions of the US House intelligence committee, which is conducting its own probe into the purported Moscow connection.
The Russian officials have repeatedly stressed that Moscow does not interfere in other states' internal affairs, calling allegations of all such meddling groundless.
The Channel 4 investigation revealed the scope of the company's activities. According to it, Cambridge Analytica has worked across the globe and claimed to have been instrumental in Ukraine's Orange Revolution, a series of protests that followed the 2004 presidential election. The company was involved in the Italian and Czech elections as well.
Its reach has spread much further than Europe. In Kenya, the data company helped Uhuru Kenyatta secure the presidency in 2013 and 2017, according to the investigation. It has also operated in India and Malaysia.