Eindhoven municipal council (2010–2016) During the
2010 municipal elections, Van den Nieuwenhuijzen was second on the
party list of GroenLinks in
Eindhoven. He was elected councilman with 257 votes, while his party received four out of 45 seats. He kept working at Betonson and was chosen political talent of 2010 in the Eindhoven "Council Member of the Year" election. In October 2012, it was announced that Eindhoven would host the
pride parade Pink Saturday in 2014. Van den Nieuwenhuijzen had been chairing a committee since 2010 to bring the event to the city. In the run-up to Pink Saturday, he announced that he had received an anonymous threat in his mailbox, saying "filthy faggot, fuck off with your illness and Pink Saturday". Van den Nieuwenhuijzen filed a
criminal complaint. In 2013, he was voted Council Member of the Year. Van den Nieuwenhuijzen was
re-elected in 2014, when GroenLinks retained its four seats. He had run for GroenLinks in Eindhoven, but did not win. He was also 32nd on the party list of GroenLinks in
North Brabant during the
2015 provincial elections. In September of that year, he won the last edition of the beauty pageant
Mister Gay Netherlands. He had before participated in the 2007 edition. Van den Nieuwenhuijzen passed the opportunity to take part in the
Mr Gay World pageant because of other commitments. He became a member of a committee to choose the new mayor in early 2016. Van den Nieuwenhuijzen left the municipal council in May 2016 to become alderman.
Alderman (2016–2019) He became alderman in
Son en Breugel of, among other things, finances, culture and sustainability, on 12 May 2016 as part of a new executive board. The previous coalition had collapsed halfway through its term. In the executive board, Van den Nieuwenhuijzen represented GroenLinks as well as the
Labour Party (PvdA), as both parties work together in Son en Breugel politics. Van den Nieuwenhuijzen wrote a letter in 2016 asking all Dutch municipalities to hang
rainbow flags on
Coming Out Day. Over 160 out of 390 of them complied compared to about 80 the previous year. He remained alderman after the
2018 municipal elections, because PvdA/GroenLinks became part of the new coalition. His responsibilities included sustainability and citizen participation. During the 2018 elections, he was also on place 28 on GroenLinks' party list in
Utrecht. Van den Nieuwenhuijzen resigned from his position in January 2019. According to a statement, he was unable to have an impact on the things in politics that mattered most to him. A number of his proposals to improve the environment had been rejected by the other coalition partners in the preceding months. His plan to decrease the sewerage charges for inhabitants who do not connect their
downpipe to the sewers was passed by the municipal council a month after his resignation. == House of Representatives (2020–2021) ==