Psychologists
Our psychologists have different backgrounds and specialisms.
Tim Wind
Tim works online as an independent PhD clinical psychologist and psychotherapist at POLARIS. He is a cognitive behavioral therapist and senior schema therapist, specialized in trauma-related complaints, anxiety complaints, depressed mood and personality problems. Tim works in addition to POLARIS as a practitioner at Centrum ’45, he is Senior Lecturer in E-health at RINO Amsterdam and founder and director at Psyflix.
Chamber of Commerce: 72352426
Clinical psychologist BIG registration: 19917078025
Psychotherapist BIG registration: 19917078016
Janneke Ferwerda
Janneke is a clinical psychologist, psychotherapist and behavioral therapist. She specializes in the treatment of trauma-related complaints, anxiety complaints, self-image problems and personality problems. In addition, she has a lot of expertise and treatment experience in the field of psychotic complaints. In addition to her work at POLARIS, Janneke is affiliated with GRIP Psychologen as a practical trainer and as a teacher at Gedachten Uitpluizen. She is registered as a supervisor with the Association for Behavioral and Cognitive Therapy (VGCt), schema therapist and EMDR practitioner.
Chamber of Commerce: 71053646
Clinical psychologist BIG registration: 09912404025
Psychotherapist BIG registration: 2991240401
Carlos Croes
Carlos is a clinical psychologist, psychotherapist, and cognitive behavioral therapist. He specializes in treating trauma-related symptoms, anxiety, depression, burnout, ADHD, self-esteem issues, unexplained physical pain, sexual problems, relationship issues, and personality disorders. Additionally, he has extensive expertise and experience in treating psychotic symptoms. In addition to his work at POLARIS, Carlos is affiliated with GGZ Centraal as a training supervisor, manager of a digital clinic, and a teacher at the Cognition and Psychosis Foundation. He is also the founder and teacher at the E-Health Academy. He is registered as a supervisor with the Association for Behavioral and Cognitive Therapy (VGCt), offers schema therapy, and is an EMDR therapist.
Chamber of Commerce: 94015427
Clinical psychologist BIG registration: 19066664825
Psychotherapist BIG registration: 39066664816
Heleen Grandia
Heleen Grandia works as a clinical psychologist and psychotherapist at POLARIS. She specializes in schema therapy, treatment of trauma-related complaints, emotion regulation problems (fear, anger, sadness) and persistent patterns and complex problems that are sometimes described as personality problems.
She also regularly teaches schema therapy for Forta Opleidingen. She is registered as a schema therapy supervisor and with the Association for Behavioral and Cognitive Therapy (VGCt).
Chamber of Commerce: 75338157
Clinical psychologist BIG registration: 49916534925
Psychotherapist BIG registration: 69916534916
Helga Ising
Helga is an independent clinical psychologist and psychotherapist with a PhD, working online at POLARIS. She specializes in the treatment of anxiety, trauma-related issues, burnout, self-image problems, and persistent patterns or personality disorders. Additionally, she has extensive expertise and experience in treating psychotic disorders. Helga is trained in cognitive behavioral therapy, schema therapy, EMDR, and imaginary exposure. Treatment can also be provided in German, and on Fridays, she offers in-person sessions at a location in The Hague. In addition to her clinical work, Helga is a lecturer and a member of the editorial staff of ‘Gedachten Uitpluizen’.
Chamber of Commerce: 94200297
Healthcare psychologist BIG registration: 99925808425 (per 10-2-2025 registered clinical
psychologist)
