Every successful person had one or more people in their lives who believed in them, and who were willing to “take the bet.” I was lucky enough to have a few of those as well. They made me aware of blind spots that would at some point become a showstopper. At the same time, they helped me to leverage key qualities. Sometimes subtle, sometimes brutally honest and direct. Always with generosity and compassion. As a coach, I wish and work to be that trusted advisor and help leaders become the best version of themselves.

“Authentic leadership is where integrity meets influence”

Mariëlle de Macker

Supervisory Board member at RAI, Maastro, MSD Animal Health, and Van Loon Group, and working with Innovation Industries

Former CHRO Hema, Managing Director Group HR Randstad, and HR Director GE Healthcare Life Sciences

After graduating with an MSc degree in Industrial Engineering from Eindhoven University of Technology, Mariëlle focused her career on the impact and development of human capital. She has built her experience over more than 20 years at global organizations, both listed and private equity, at home and abroad, always in HR leadership roles at the MT / Executive Board level. Sectors she has gotten to know in depth include retail, business and professional services, healthcare, and process industries.

Mariëlle is a strong connector. She is an excellent listener who asks insightful questions. She combines an analytical mind with creativity in designing solutions, always connecting the primary process, organization DNA, and culture with strategic objectives and market conditions. She explicitly focuses on leadership and teams, and what is needed to empower and grow them, to ensure leadership continuity combined with lasting change and transformation.

Particularly effective at supporting founders, CEOs, and entrepreneurs, she is seen as approachable through all layers of the organization, down to earth, and with a good sense of humor.

Mariëlle loves to travel and enjoys sports and reading Scandi thrillers.

Organization, leadership & culture

Business & people strategy

Transformation & change

Team development and effectiveness

Supervisory Board & governance

Meet our team

At NGL we work passionately to let a new generation of leaders flourish at the top, with an integral approach to executive search, assessments, coaching and leadership development. We do this with flair and finesse, and with a keen eye for balance. You can always expect complete professionalism from us, but also a sincere commitment and humanity. Our holistic philosophy and wide-ranging services make your organization stronger and more effective.

By joining forces, the people at NGL International have brought together a unique and complementary mix of experience, expertise and personalities. We are each other’s sparring partners – and, of course, yours.


Bercan Günel

Are you ready to take the lead?

Vincent Moolenaar

“Leadership grows from hindsight, through insight, to foresight."

Jacqueline Smit

“If you blend in, it becomes mediocre”

Ron de Mos

"The key to performance is aligning your 'why', 'strategy, and behavior"

Mariëlle de Macker

“Authentic leadership is where integrity meets influence.”

Saskia Hooft

“An open dialogue is crucial to keep things going”