Dorien Gruppelaar

Dorien Gruppelaar

Assessment adviser and personal coach

Dorien studied Psychology and the University of Groningen. After holding some commercial positions outside of her current field of expertise, she started her career as psychologist with Ernst & Young van der Giessen (EY). She switched to LTP Business Psychologists as senior consultant in 2003. In her role as assessment adviser, she focussed strongly on talent and management development. During this period, she completed several 360-degree feedback projects, gave trainings and held review sessions on both personal- and leadership development.

Over the years, Dorien has grown to be a popular coach for both individual clients and teams. With LTP she increasingly fulfilled the role of account- and project manager, and thus was responsible for large accounts and large-scale projects.

In June 2014, she found her own practice and joined Jonathan Warner. Dorien is remarkable for her energetic and kind style, but also for her crisp analyses and sharp recommendations. Dorien creates calm and open environments, making her successes appear almost self-evident. Dorien has worked for various financial institutions, such as ABN AMRO, DNB, ING and Rabobank, for several ministries, and for companies such as PostNL, NS, Schiphol and KLM.

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Our team

Jonathan Warner has a team of 11 consultants. The qualifications of our team spread across the entire spectrum of our services. In addition, we maintain an extensive network of consultants whom we employ when the size or specificity of an assignment is beyond the capacity of the team presented below.
Arjan Eleveld

Arjan Eleveld

Managing partner and management consultant

Reinout van Kalleveen

Reinout van Kalleveen

Partner and executive coach

Amber van den Hout

Amber van den Hout

Partner and assessment adviser

Herman Prakke

Herman Prakke

PARTNER, EXECUTIVE TEAMCOACH AND EXPERT ON CORPORATE CHANGE

Dorien Gruppelaar

Dorien Gruppelaar

Assessment adviser and personal coach

Frank van Luijk

Frank van Luijk

Executive assessment adviser

Pernille La Lau

Pernille La Lau

Presentation coach

Hans Roos

Hans Roos

Management consultant and personal coach

Frédérique Groen-Dudok de Wit

Frédérique Groen-Dudok de Wit

Career consultant

Rene Bastiaansen

Rene Bastiaansen

Specialist in leadership training

Jolanda Vollebregt

Jolanda Vollebregt

Office Manager

Frans Gosses

Frans Gosses

Executive coach