1. Pieter Aren Grinwis was born on 12 October 1979 and is a Dutch politician, who has been serving as a member of the House of Representatives on behalf of the Christian Union since March 2021.

1. Pieter Aren Grinwis was born on 12 October 1979 and is a Dutch politician, who has been serving as a member of the House of Representatives on behalf of the Christian Union since March 2021.
Pieter Grinwis previously served as a municipal councilor in The Hague and assisted the party in the House of Representatives and the Senate.
Pieter Grinwis grew up in that village with his two younger brothers and attended the Middelharnis secondary school CSG Prins Maurits at level.
Pieter Grinwis subsequently studied economics of agriculture and environment at Wageningen University and Research, but he did not finish his program due to an illness and a scooter accident.
Pieter Grinwis has told that he ended up at the Christian Union due to senator and philosopher Egbert Schuurman, one of his professors in university.
Pieter Grinwis received a degree in public administration from Leiden University in 2020.
Pieter Grinwis replaced a staff worker, who was on parental leave, the following year and got a permanent position as policy officer of the House caucus in 2004.
Pieter Grinwis served as the political assistant to state secretary and minister Tineke Huizinga starting in 2007.
Pieter Grinwis had been involved in the creation of the governmental cooperation as Huizinga's assistant and continued working there until 2015.
Pieter Grinwis was the of the shared list of the Christian Union and the SGP during the 2014 municipal election in The Hague.
Pieter Grinwis introduced over 65 motions and amendments that passed during his first term, more than any other councilor in The Hague in the same years.
Pieter Grinwis served as a negotiator of the Christian Union concerned with financial policy during the government formation.
Pieter Grinwis was re-elected as municipal councilor in 2018, again being the of the Christian Union and the SGP.
The council banned the sale of laughing gas on the streets in 2020, a year after Pieter Grinwis had first proposed it.
Pieter Grinwis designed a new tax system for the campaign, calling the current one "hopelessly unjust, complex, and individualistic".
Pieter Grinwis said that the current system was focused too much on stimulating people to do paid work.
Pieter Grinwis served as his party's spokesperson for agriculture, nature, food quality, finances, climate, energy, water management, housing, spatial planning, economic affairs, and infrastructure.
Pieter Grinwis brought forward a compromise in May 2022 when D66 and GroenLinks wanted to abolish unelected members of water councils through an initiative bill.
Pieter Grinwis's amendment was carried to remove the unelected member of daily management and to fix the unelected water council members to two representing farmers and two representing nature organizations, thereby getting rid of company representatives.
In October 2022, Pieter Grinwis proposed a new tax on online shopping deliveries due to their greenhouse gas emissions and the nuisance caused by delivery vans.
Furthermore, Pieter Grinwis submitted an initiative bill with Henk Nijboer to prohibit temporary rental contracts for houses in most cases.
Pieter Grinwis decried an amendment proposed by the VVD and the CDA to include an exception for landlords with one unit who want to sell their property.
Pieter Grinwis was re-elected in November 2023, and his specialties within the Christian Union's parliamentary group remained the same.