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Ingrid Visseren-Hamakers

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Ingrid Visseren-Hamakers
Visseren-Hamakers in 2025
Member of the Senate
Incumbent
Assumed office
13 June 2023
Personal details
BornIngrid Jacoba Hamakers
(1970-02-03) 3 February 1970 (age 56)
Brummen, Netherlands
PartyParty for the Animals
Other political
affiliations
GroenLinks
Education
Occupation
  • Professor
  • politician

Ingrid Jacoba Visseren-Hamakers (born 3 February 1970) is a Dutch academic and politician of the Party for the Animals (PvdD). She is a professor of environmental policy at Radboud University Nijmegen. Her work focuses on global environmental governance, biodiversity, and sustainability transitions.[1] Since 2023, she has served as a member of the Senate.

Early life and education

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Visseren-Hamakers was born on 3 February 1970 in Brummen, Gelderland.[2] She studied environmental and social sciences at Utrecht University, and business administration at Erasmus University Rotterdam.[2]

Career

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Visseren-Hamakers held academic positions at Wageningen University and George Mason University in the United States, before joining Radboud University in 2019.[3] Between 2016 and 2019, she served as coordinating lead author for the global assessment report of the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES).[3]

Her political career began in Rotterdam, where she was a member of the IJsselmonde borough council from 1998 to 2002, on behalf of GroenLinks.[3] From 2004 to 2007, she served in the party's executive board.[3] She later joined the Party for the Animals (PvdD), and was elected as a member of the Senate in the 2023 election. On 3 February 2025, she succeeded Niko Koffeman as leader of the PvdD Senate group.[4]

Visseren-Hamakers Group

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On 10 November 2025, it was announced that Visseren-Hamakers had left the PvdD Senate group, forming her own independent group.[5] The split followed an internal dispute, after Niko Koffeman had resigned his party membership on 21 October 2025, citing dissatisfaction with the party's political direction.[6] He was supported by fellow senator Peter Nicolaï.[7] As a result, Koffeman and Nicolaï continued together under the party banner, while Visseren-Hamakers formed a separate group.[8] Despite the formal split, Visseren-Hamakers is regarded by the Party for the Animals as the sole legitimate representative of the party in the Senate.[8]

Electoral history

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Electoral history of Ingrid Visseren-Hamakers
Year Body Party Pos. Votes Result Ref.
Party seats Individual
2004 European Parliament GroenLinks 4 [?] 2 Lost
2023 Senate Party for the Animals 3 2,112 3 Won

References

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  1. ↑ "prof. dr. I.J. Visseren-Hamakers (Ingrid)". Radboud University (in Dutch). Retrieved 23 November 2025.
  2. 1 2 "prof. dr. I.J. Visseren-Hamakers (Fractie-Visseren-Hamakers)". Eerste Kamer (in Dutch). Retrieved 23 November 2025.
  3. 1 2 3 4 "Ingrid Visseren-Hamakers". Partij voor de Dieren (in Dutch). Retrieved 23 November 2025.
  4. ↑ "Ingrid Visseren-Hamakers nieuwe fractievoorzitter Partij voor de Dieren in Eerste Kamer". Partij voor de Dieren (in Dutch). 28 January 2025. Retrieved 23 November 2025.
  5. ↑ "Senator Visseren-Hamakers splitst zich af van de PvdD-fractie". Eerste Kamer (in Dutch). 10 November 2025. Retrieved 23 November 2025.
  6. ↑ "Mede-oprichter Partij voor de Dieren Niko Koffeman stapt uit partij". NOS (in Dutch). 21 October 2025. Retrieved 23 November 2025.
  7. ↑ "Conflict bij Partij voor de Dieren in Senaat over wie nu uit fractie is gestapt". NOS (in Dutch). 7 November 2025. Retrieved 23 November 2025.
  8. 1 2 "Nicolaï en Koffeman vormen PvdD-fractie, Visseren-Hamakers vormt eigen fractie". Parlement.com (in Dutch). 10 November 2025. Retrieved 23 November 2025.
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