Coffee Matters

Iris Posthouwer is an author, keynote speaker and trainer, specializing in boundary-setting and communication in professional settings. She aims to make uncomfortable conversations more comfortable. She works with teams and leaders across sectors — from healthcare to media — helping people navigate tension, speak up with clarity, and stay human in difficult conversations. Her bestselling book “Iets met grenzen stellen” (“Something About Setting Boundaries”) has resonated widely in the Netherlands. This is her story...

Marie Körbl is a Dutch performer, musical theatre artist and theatre maker whose work is centered around the narratives of womanhood She trained in Urban Contemporary Dance (JMD) at the Amsterdam University of the Arts and holds a Master’s degree in Musical Theatre from Mountview Academy of Theatre Arts in London.Marie has also appeared in major musical theatre productions performing the role of Vlinder in Zodiac the musical, Frenchy in Grease & cover Sophie in MAMMA MIA! UK.Marie will soon appear in Aletta – de Musical (Theater Oostpool & TEC Entertainment), a comedy musical about the life of Aletta Jacobs, the first female doctor in the Netherlands and a pioneer for women’s rights. The production premieres 21 March 2026 in Amsterdam and will tour nationally.

Rasha Hilwi is a Palestinian writer, journalist and storyteller based in Amsterdam.

Roy van Rosmalen was born in Nijmegen, the Netherlands andmoves through the world with an eye for the unseen, capturing atmospheres that others might overlook. His work balances architecture, nature, colour and texture—subtle yet charged with an inviting tension. With his company, Roy scouts locations for feature films, series, and commercials, always in pursuit of the perfect setting. Beyond this, his photography transforms fleeting moments into tangible art, available for those who seek to own a piece of his vision. Somewhere in the background, the crackle of vinyl—a craft he’s mastered since the age of twelve—spins his story forward.

Tony Tonnaer is a Conscious Consult with over 20 years experience in building sustainable denim brands. Tony has always had a love for denim, starting his first job in the denim industry in 1997 at Pepe Jeans as product manager working together with denim experts like James Veenhoff (House of Denim), Jason Denham (Denham), Karl-Heinz Müller (founder Bread&Butter) and Fred Gehring & Ludo Onnink (Tommy Hilfiger).After Pepe jeans he helped revive the Dutch denim brand Kuyichi putting them on the map as the first sustainable denim brand in the European market. In 2011 Tony made his own mark on the industry when he launched his brand ‘Kings of Indigo’ that became one of the key pioneering denim brands at the forefront of sustainable innovations. This is his story today...

Jan Roelfs is a key note speaker on Personal Leadership in Group Dynamics and Personal Positioning in the Demanding World of Media. He studied Political Science and International Relations in Amsterdam before joining the Public Relations firm Hill & Knowlton and eventually fulfilling one of his dreams to become a sports host at RTL Television in the Netherlands, Sport 7 and the international pay TV Sports channel Canal +.His voice is known by millions on Dutch national broadcast corporation NOS as a member of their sports presentation and commentator team. At NOS he is thecommentator on all the big Football events (Champions League, World Cup), and other events as the Olympic Summer and Winter games, the Tennis Grand Slams; Melbourne, Paris, London, New York. A regular to Monks Coffee, I'm thrilled he's joining me on Coffee Matters today.