Denny Portier Terpstra


Denny Portier-Terpstra

The Netherlands

  •      Coach

  •      Mentor

  • IRCM Registered

  • External Verification

  • Qualified

Denny Portier-Terpstra, based in The Netherlands, is a professional Sparring Partner with over 20 years of experience in executive and non-executive leadership, human resource management, coaching, mentoring, consulting and facilitation.

As a Sparring Partner, Denny offers a unique approach to development, by combining coaching, mentoring & consulting. In this capacity, she works with business leaders and their teams on their personal, professional, team and strategic business development.

In addition, Denny holds a number of executive, non-executive and advisory board roles, and she occasionally mentors HR leaders on their strategic agenda, out of her own company 'On A Mission, to make your work a better place'.

Before she ventured out on her own, Denny had a progressive career in HR and leadership, lastly working in a director-level strategic HR Business Partner role at UBM Plc. Denny also cofounded and established RadioCorp BV, a very successful media company in The Netherlands. She held both executive and supervisory board roles at this company, and was a shareholder, until the company was sold to Talpa in 2016.

Throughout her career, Denny has gained decades of experience with developing and facilitating internal mentoring and coaching programs, buying coaching and mentoring services, receiving coaching, mentoring and facilitation training, and acting as an HR and leadership mentor and a coach herself. She has joined the IRCM board in 2018.

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  • I agree to abide by the Coaching and Mentoring industry Standards and Ethics.

  • I agree to abide by the Coaching and Mentoring industry's minimum levels of Core Competencies.

  • I agree to abide by the Coaching and Mentoring industry Disciplinary Procedures.

  • I recognise the Coaching and Mentoring industry Ombudsman Service.



20 - 25 years of working in the coaching and mentoring industry

  • Management Coaching
  • Human Resources Coaching
  • Human Resources Mentoring
  • Professional Development Mentoring
  • Organisational culture and behavioural Coaching
  • Organisational culture and behavioural Mentoring

This individual is REGISTERED with the IRCM.

Professional Body Accreditation/Credential Date ¹

¹ format = DD/MM/YYYY

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Name: Type of
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This Coach and/or Mentor may have undertaken additional formal and informal Qualifications, Training, as well as a range of Short Courses and Workshops.  For more information about their qualifications and training, please contact the Coach and/or Mentor.

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click here to confirm the status of the:

  • Formal Education Body - Registered, or not?
  • Commercial Training Organisation - Registered, Accredited by a Professional Body, or not?

On A Mission

Registered at the Chamber of Commerce

The Netherlands

The Netherlands



Currently, all information provided by and correspondence with
the IRCM is in English.