Our team

Ilse Visser


+31 (0)20 34 55 104

"Every problem has a solution... If it doesn't then it's not a problem"

A co-founder of Undutchables, Ilse is the motivating, problem solving pillar of Undutchables. The Undutchables team is her pride and joy. Ilse’s personal goal also includes contributing to (small) changes in the world by actively helping charities.

Nick van der Dussen

General Manager

+31 (0) 70 711 8300

"Never give up on the things that make you smile"

Nick started working at Undutchables in 2000 and has over 20 years of recruitment experience. He loves making things happen for colleagues, candidates and companies. Nick values a sense of humor and a good (practical) joke. He enjoys walking his dog, music, soccer and cars.

Koen Knoop

Sales & Recruitment Manager

+31 (0) 70 711 8300

"The key to success is to start before you’re ready"

Koen is our Sales and Recruitment Manager of the Rotterdam, The Hague and Eindhoven offices. His strong networking skills, 2,5 years working experience as Recruitment Consultant at Undutchables and an open way of communication makes him easy to approach and the linking pin between the businesses and our Recruitment Consultants. Koen has a glass half full perspective and has the ability to bring a smile on everyone's face. In his spare time he loves to ride his motorcycle and does volunteering work.

Katja Heurkens - Grunewald

Branch Manager

+31 (0)70 711 83 00

"The highest form of bliss is living with a certain degree of folly"

Katja has been working at Undutchables since 2006 and is a dedicated and enthusiastic Recruitment Consultant in the The Hague/Rotterdam team. She enjoys making a difference to her candidates and clients with her professional-personal touch. Katja loves having a good laugh with her colleagues in the office, and enjoys good food. Originally from Berlin she is an Undutchable herself. Together with her husband she loves to travel and see the world, and hopes to own a cat one day.

Oliver Gell

Recruitment Consultant

+31 (0)30 - 238 22 28

"Absorb what is useful, discard what is useless, and add what is specifically your own"

Oliver is client and candidate focused, and has strong communication and interpersonal skills. He loves to build relationships and pass on his experience about living in the Netherlands since he moved from London. When he isn’t at work he is supporting Arsenal and playing pool with friends.

Kirsten Jansen

Marketing Communication Manager

+31 (0)70 711 83 00

"Sing as if no one can hear you"

Being energetic, creative and verbally-strong Kirsten is the chief of our marketing department. With her strong organisational and planning skills she easily runs multiple projects/events all at once. Kirsten is a true family person who loves to spend time with her young daughter and enjoys the great food her husband prepares. 

Silvia Kooijmans

Recruitment Consultant

+31 (0)70 711 83 00

"Speak in such a way that others love to listen to you. Listen in such a way that others love to speak with you"

Silvia is our Italian/Dutch recruiter in the The Hague office. Thanks to her strong listening skills and meticoulus way of working Silvia is able to find the perfect job for her candidates within a blink of an eye. She enjoys good weather, design knitwear and makes a mean Nutella cheesecake for her colleagues. Even though she is from Bologna, please do not ask her how to make bolognaise, she has no idea. This girl is solely available for dessert questions.

Sie-Wai Tsang

Recruitment Consultant

+31 (0)20 623 13 00

"To travel is to live"

Our Amsterdam Recruitment Consultant since 2006. Sie Wai is very successful in recruitment as well as client relationship management with her clients and candidates. Her passion is (culinary) traveling; she loves to discover the world with her husband and learn about new dishes and recipes along the way. 

Anja Groot

Financial Controller

+31 (0)20 623 13 00

"Choose a job you love and you will never have to work a day in your life"

As Financial Controller Anja is a stable factor at Undutchables HQ. With her strong eye for detail and perseverance she makes sure that our financial administration runs smoothly. Anja loves to travel the world and explore new things with her family and when the sun is out you can find her on a terrace soaking up the first rays of sunlight.

Marley Hornstra

Recruitment Consultant

+31 (0)30 - 238 22 28

"One is not always happy when one is good; but one is always good when one is happy"

Marley moved to the Netherlands from Melbourne, Australia. She came here to get back in touch with her Dutch roots, learn a new language and explore Europe. Her passion for experiencing and learning about different cultures was realized during her time living in London. Marley is able to relate to her candidates from her personal experience with living abroad and really enjoys being able to help other Undutchables get their best start in the Netherlands. In her free time, Marley loves to cook and eat out, socialize, travel to new places, read, do group exercise and binge on a good Netflix series.

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