Seven West Media (SWM) is back in hot water after ABC's Four Corners program last night revealed allegations of a toxic workplace culture, with several former staffers describing instances of bullying, sexual harassment and sexism.

The media conglomerate has acknowledge it is concerns by the allegations raised by the investigation, but has claimed in a statement that "a number of the matters raised" were historical cases that had been "well aired and dealt with" and "in some cases many years ago".

The statement went on to outline that a number of people who had "displayed behaviour not reflective of SWM's values" had already been let go from the organisation.

Mark Llewellyn, who exited the business in April amid the fallout of the Bruce Lehrmann scandal, was one of the former SWM staffers that was subject of the Four Corners episode on Monday evening. The program revealed claims the former Spotlight executive producer had sent a number of offensive and antisemitic text messages to producer Taylor Auerbach during his four years working on the program.

ABC's Louise Milligan described a sense of fear amongst former Seven employees, many of who had been silenced by non-disclosure agreements that were signed in exchange for payouts.

“They’re trying to present an illusion of being robust, happy workplaces, performing a public interest in cutting-edge journalism,” said Maurice Blackburn's national head of employment law Josh Bornstein, who as well as representing multiple clients from Seven and Nine, has been the lead on Antoinette Lattouf's case against the ABC.

“What the NDAs do is mask the reality of a brutal workplace culture in which women particularly are mistreated very badly and routinely. It’s an unusually brutal culture. I haven’t seen anything like it," said Bornstein.

The program also aired multiple allegations made by female employees, including Amy Tauber, who was dismissed from Seven shortly after making a sexual harassment complaint against a senior male staffer.

"We encourage all Seven West Media team members to call out any behaviour that does not reflect our values. Whistle-blower protections are in place and are regularly re-emphasised with all staff," continued SWM's statement. "We have a great team at SWM and the actions of some individuals do not reflect the values, behaviour and attitude of the business as a whole, which is home to some of the best, hardest working and most passionate media professionals in Australia. Our focus is to build a stronger culture that enables our great people to thrive, and where unacceptable behaviour is not tolerated."