ABOUT US
ABOUT US
Connecting worlds with unique SF skills
The Dutch Special Operations Forces (SOF) are among the absolute elite of the armed forces — deployed worldwide and trained to perform under extreme pressure. Only a few make it through the demanding physical and mental selection.
But what happens after their active service?
Nassau420 builds a bridge between defence and society.
We give former operators the opportunity to share their unique knowledge and skills with companies and civilians. In doing so, their expertise remains valuable to society — and they find a new purpose as mentors and experts.
Joining forces for a resilient society
At Nassau420, we look beyond ourselves. Our mission is to help build a stronger and safer society. With integrity and transparency, we combine military and civilian expertise to make both defence and society more resilient.
We work with trusted partners: operators from the Dutch Special Operations Forces, international units, and civilian experts. Uniting Brains & Boots.
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Tomorrow’s missions demand new forms of collaboration. Nassau420 connects thinking power with action — to make Europe stronger and more resilient.
At Nassau420, our close-knit team is at the core — just like the brotherhood within the Special Operations Forces.
With over 21 operators and 14 civilian specialists, we build relationships based on trust, openness, and respect.
We’re transparent about expectations and growth opportunities. Everyone feels supported and valued. That not only makes us stronger as a team, but also better equipped to create real impact for our clients, partners, and society.
Brother and Sisterhood as the basis of a top team
9, 1
Hundreds of participants and dozens of companies participated in our Experiences last year. On average, they gave us a big 9 as a rating and we are very proud of that!
Get to know us | our core team operators
Operator Nassau20 (Thomas)
A combination of stress resistance and extreme competitiveness, together with self-reliance and self-criticism. My stoic nature forms the core of my character, while my family is always my rock. Almost twenty years of experience as an Operator.
Operator Nassau14 (Nicolai)
Where thoughts and processes intertwine, I believe in the power of simplicity. In nature, surrendering yourself to pain and discomfort for growth and acceptance. Many deployments as an operator and experienced instructor Special Operations Forces.
Operator Nassau201 (Thijs)
Physical strength is the foundation, true strength rules over thoughts: 'You hold the strings of your thoughts.' Mental and physical growth, rejection of shortcuts build character and willpower. Very experienced Instructor at Special Operations Forces.
Operator Nassau18 (Ronald)
Unwavering mental strength, calmness, and preparation are key. Success lies outside his comfort zone, where true possibilities become visible. Experienced Operator and Instructor in the Special Operations Forces, focused on pushing boundaries.
Operator Nassau13 (Marcus)
Like an oyster that turns its problem into a pearl….off the beaten track….adaptive with its own vision and always going for the highest possible. 20 years of experience in the Special Operations Forces as Operator and Instructor.
Operator Nassau8 (Hans)
Hard worker who performs best in a high performance team. Positive and fan of honest communication. 20 years of experience within the Explosive Ordnance Disposal Service (EOD) and working with the Special Operations Forces.
Get to know us | core team Experts
Prof. Daan Dohmen, PhD
Freedom, justice, creativity, perseverance, openness, loyalty and respect. For me, no empty slogans but the basis for my inner compass. Serial impact entrepreneur and investor. As a professor, driven to connect worlds and people and thus learn together.
Marike Dohmen, MSc
Leadership, trust, openness, determination, innovation and respect are the values that drive me. As COO of Nassau420, I lead operations and special projects with passion and vision - connecting people and worlds to create lasting impact together.
Janneke Tettero, MSc
Structured, energetic, and optimistic. Always learning and reading about human interaction. Curious about team dynamics. Corporate anthropologist and experienced executive in purpose-driven organisations. On a mission to understand organisation culture.
Wout Tilders
Non-conformist in heart and soul, addicted to nature and adventure. Crazy about real stories with a solid common thread. Loves nothing more than to translate these into words and images. Experienced marketing professional, owner of marketing agency and former adventure travel organizer.
Javelin Zwakhalen
Artist, philosopher and warrior with the soul of a samurai. Working as a spiritual counselor in the military with long experience in special units. Trust and community spirit as the cork on which they float. "Paradise lies in the shadow of the sword".
Rob Bartels
52 year old boy with a turbulent history. Lets himself be amazed by the beauty and power of nature. Has learned from the cold that feeling is understanding. Was a policeman and now for over 20 years an actor, behavioral trainer and certified Wim Hof Method Expert.