Managing Director, Parkmobile
General Manager, Catawiki
Regional Director, Chains, APAC,


Siilo are breaking down the silos in healthcare by creating a virtual network around the patient population. They are making huge strides in moving the healthcare sector to a more modern and effective way of communication. Founded in 2016, Siilo has created a secure peer-to-peer communication platform where all healthcare professionals can live. The app enables the healthcare sector to communicate with team members and their peers whilst remaining 100% confidential and secure. The app enables professionals to make quicker and better decisions. The impact of Siilo can be measured in lives saved, quality of life improved and reduction of costs.

Search Background

Siilo were growing at a rapid pace and needed a COO to lead the strategy and execution of the near to medium term targets of the business. The COO would be responsible for crafting the GTM functions, implementing data-driven operations and work closely with Marketing and the Prisma team.


The successful candidate needed to have experience in leading operational and commercially functions in fast-growing businesses and demonstrate a clear leadership ability that enables a wide-ranging group of functional leaders to operate successfully together. This person would work closely with the executive team and the Board as a sparring partner.


Erevena identified and introduced Esther van der Meer to Siilo. Esther brings over 15 years’ international leadership experience with a track record across marketing, sales and operational excellence. Bringing full P&L ownership experience across teams of 200+, Esther combines this with an ability to operate in fast-paced businesses, venture-backed businesses. Esther gained experience at early in her career, working closely with the CEO.

Joost Bruggeman

Founder and CEO

Erevena understands the dynamics around the COO role in relation to the founder/CEO role very, very well. This established a clean process where they generated a lot of confidence and trust between us and the candidate. This proved to be extremely effective in terms of getting the best COO on board we could possibly dream of.

Our expert

Jonathan Bryant, Partner

Specialisms: Product, Engineering, General Management

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