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About us

Whistleblower policy

Within SGH, there is a whistleblower policy so that employees feel safe reporting (suspected) misconduct. The policy also includes agreements regarding the careful handling of the report.

A good whistleblower policy contributes to an open and safe organizational culture in which employees feel involved in and responsible for their organization. For SGH, it is an important means of fulfilling its social responsibility.

Whistleblower scheme September 2023
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Merel van Nimwegen

  • Merel van Nimwegen is a pediatric physiotherapist. She specializes in treating children with headaches, sensory processing issues, and psychosomatic complaints. Since 2025, Merel has been working on Fridays at the Paramedical Treatment Center for Headaches to treat children under the age of 14 with headaches. Additionally, she works in Heemstede: www.kinderfysio-heemstede.nl.
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Linda Pronk

  • Physiotherapist specializing in the treatment of jaw complaints, headaches, and dizziness. She is also specialized in edema therapy and psychosomatic physiotherapy.
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Veronique Huisman

  • Manual therapist specializing in the diagnosis and treatment of patients with headache complaints. She specializes in dry needling to complement the treatment of neck and headaches. Additionally, she specializes in the diagnosis and treatment of shoulder complaints.
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Tim Jongejans

  • Manual therapist specialized in the diagnosis and treatment of patients with headache complaints. Additionally, he is pursuing scientific training at the Vrije Universiteit Amsterdam (Musculoskeletal Physiotherapy Sciences).
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Jasper Flick

  • Manual therapist specializing in treating various forms of dizziness, including the most well-known: BPPV. He also treats patients with headaches, spine-related complaints, and sports injuries.
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Dr. René Castien

  • Manual therapist, senior researcher at Vrije Universiteit Amsterdam, and advisor at the Paramedical Treatment Center for Headache. Obtained a PhD from the Faculty of Medicine at Vrije Universiteit Amsterdam based on research into the effectiveness of manual therapy for tension headache. René supervises and coordinates the collaboration on scientific research into headache between VU Amsterdam and the Paramedical Treatment Center for Headache.
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Laura de Kam

  • Manual therapist specializing in treating various forms of dizziness, including the most well-known: BPPV. She also treats patients with neck complaints, with and without headaches.
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Lotte de Fockert

  • Manual therapist specializing in the diagnosis and treatment of patients with headache complaints. She specializes in dry needling of the neck, jaw, and throat muscles to complement the treatment of headache and orofacial complaints. She also treats people with shoulder complaints.
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Andreas Amons

  • Manual therapist specializing in the treatment of patients with headache complaints. At the Department of General Practice of the Amsterdam UMC, he is conducting doctoral research into the effectiveness of manual therapy for migraine.