Benita Ferrero-Waldner at the UN General Assembly in 2009 | John Thys/AFP via Getty Images Another Barroso commissioner under fire Benita Ferrero-Waldner took up a new job the same month she had quit her post.

Dutch newspaper De Volkskrant reported on Friday that Austria's former European Commissioner Benita Ferrero-Waldner had taken a job with Spanish wind turbine exporter Gamesa the same month she had quit the Commission in 2010.

Former Commission President José Manuel Barroso would have known about her decision, but apparently had decided not to sanction her, according to the report.

It's the latest incident that sheds light on a possible violation of Commission's rules during Barroso's reign. European Commissioners are not allowed to take up new jobs for 18 months after leaving their posts.

Ferrero-Waldner was a commissioner for external relations and European neighborhood policy from 2004-2009 in the first Barroso Commission. She was the trade commissioner from 2009-2010, but quit when Barroso started his second mandate. The same month, she started working at Gamesa.

In July 2013, the Ombusman asked for a clarification from the Barroso Commission after she had received details about a possible conflict over the job. Contrary to advice from the independent ethical committee, the Commission decided in February 2014 to drop any sanctions against Ferrero-Waldner.

At the time, Barroso accepted Ferrero-Waldner's letter of apology in which she had expressed regret over an "inconvenient situation" and stressed that she'd never violate the Commission's code of conduct.

Last month, Barroso was asked to clarify his new job description with Goldman Sachs investment bank that he started in July.

On Thursday, the Commission confirmed that it had also authorized an independent ethics panel to investigate former Dutch European Commissioner Neelie Kroes’s links to the offshore companies in the Bahamas.