text: Second child: Mrs Pereiro-Mendez arrives yesterday . A top executive at Goldman Sachs secretly filmed colleagues to record their ‘sexist’ behaviour when she became pregnant. Sonia Pereiro-Mendez says she was denied millions in pay and bonuses when she announced she was expecting her first child. Male colleagues at the bank were promoted ahead of her and she was ‘mocked’ and subjected to ‘gratuitous derogatory’ comments about her childcare arrangements, she alleges. So in an attempt to prove her claim, she recorded managers at the global investment firm ‘without their knowledge’, a tribunal heard yesterday. The executive director in distressed investing – which concerns companies in financial difficulties – is suing her employer for sex and maternity discrimination. She has also lodged a claim against three senior bosses – Bryan Mix, the global head of loan trading, Nicholas Pappas, who is European head of distressed trading, and Simon Morris, global head of credit trading. Yesterday Mrs Pereiro-Mendez arrived with her second child for the first day of the hearing at Central London Employment Tribunal, which was told she would need breaks during proceedings to breastfeed. The hearing was not told who was recorded by Mrs Pereiro-Mendez, although they are likely to be among the 15 or so witnesses due to be called during the tribunal. The revelation was made by the bank’s counsel Daniel Stilitz QC, who said: ‘One key point is that... the claimant recorded some of the managers without their knowledge.’ Mrs Pereiro-Mendez, who speaks fluent German and Spanish, joined Goldman Sachs in 2003 and moved to London in 2005 after a stint in Frankfurt. But over a five-year period she claims her income took a hit because bosses ‘felt, given her pregnancy, she was no longer a significant long-term player’. Her basic salary was £250,000 in January 2010 but by January 2012 – two months after announcing her pregnancy – it had fallen to £192,000. She was also entitled to a bonus of about five per cent of the profit she generated. But in 2011 she received £200,000 rather than the £910,000 she claims she was owed. Goldman Sachs executive Sonia Pereiro-Mendez  claims after she became pregnant she was cheated out of millions of pounds . Mrs Pereiro-Mendez claims men were promoted ahead of her at the bank (pictured) while she was ‘publicly mocked,’ and subjected to ‘gratuitous and implicitly derogatory references to her childcare arrangements' Mrs Pereiro-Mendez says her bonuses and salary were cut over five years . The following year she was paid £284,000 but says she should have got a further £475,000. By 2014 there was no bonus at all, although she says she should have been given £450,000. In her claim, she says she took ‘exceptional measures’ to perform her work during maternity leave. She would attend meetings, on one occasion asking in-laws to look after the child in a car park – enabling her to ‘swiftly breastfeed her baby during breaks’. Goldman Sachs, Mr Pappas, Mr Morris and Mr Mix all deny the allegations against them . Mrs Pereiro-Mendez has accused her former manager, Allen Ukritnukun, of excluding her from meetings, claiming he ‘publicly mocked’ her before male peers ‘for no good reason’. He also allegedly ‘made overt sexist comments’, which once amounted to ‘explicit sexual harrassment’. Mr Ukritnukun was later promoted to managing director, enabling him to become ‘emboldened in his contemptuous conduct’. Mr Ukritnukun vehemently denies the allegations made against him by Ms Pereiro-Mendez and is particularly distressed by the allegation that he made a comment which amounted to sexual harassment. She also says Mr Pappas made ‘overtly discriminatory comments’ during a business trip to Germany. Mr Morris said in a statement last month that her 2011 bonus was hit partly because of her involvement in ‘significant losses’. Goldman Sachs, Mr Pappas, Mr Morris and Mr Mix deny the allegations. The case continues. Sorry we are not currently accepting comments on this article.
target: Sonia Pereiro-Mendez says she was treated unfairly after getting pregnant .
  Mother-of-two claims she missed out on bonuses worth millions .
  Senior banker says she was told she wasn't 'a significant long-term player'
  She is suing Goldman Sachs for sexism and maternity discrimination .