We stand watch over your digital world
About Heimdallr
We are a cybersecurity consultancy and system integrator, specialised in Zero Trust architecture and digital sovereignty, working exclusively with organisations where continuity, compliance, and governance are non-negotiable.
We carry the name Heimdallr for a reason: in Norse mythology, he is the absolute gatekeeper; always awake, always alert, always one step ahead. We operate by the same principle. We stand at the gates of your organisation so you can focus on what truly matters. Vigilant where necessary, invisible where possible.
Your digital watchguards
The founding partners
Heimdallr was founded on a simple frustration: too many organisations were sold tools instead of protection, and left to fend for themselves when it mattered most.
We do it differently. We bring senior people who stay close to your business, understand your risk and stand guard the way the Norse watchman Heimdallr guarded the bridge between worlds. Vigilant, clear-sighted, and never asleep.
Cees Berrens
Managing Partner
Bart van Berkel
Managing Partner
Mike Stet
Managing Partner
Specialised in Security, Governance, Risk & Compliance (GRC), Cyber Resilience and Management. I’ve delivered and managed solutions spanning Sovereign Cloud and Zero Trust for organizations that can’t afford to get security wrong.
Specialised in digital sovereignty, Zero Trust, and sovereign cloud solutions. Guides organisations through secure, modern cloud transformations in heavily regulated environments.
Expert in Zero Trust architecture and enterprise security transformations. Extensive experience in the most complex IT environments, from systemic banks to central government.
Architecture that holds
From boardroom to architecture
Cybersecurity only works when strategy, regulation, and technology are aligned and carried through to execution. This is why:
- We guide the board on risk, governance, and decision-making
- We design, build, and implement Zero Trust architecture, working directly within complex environments
- We translate regulation into technical structures that hold under pressure
End-to-end accountability
Heimdallr operates where cybersecurity directly impacts continuity, compliance, and governance. We take responsibility across the full trajectory, from first decision to operational reality.
System Integration
Zero Trust built and run inside live, critical environments.
Experts who protect vital business assets
We defend your data and systems. With expertise and strategy, we keep threats at bay and build resilience.
Realistic. Responsible. Relentless.
The Heimdallr mindset
We approach cybersecurity not as a project to be delivered, but as a continuous commitment. In critical environments, success is defined by what holds up in practice. That requires a partner who stays.
We do not believe in shortcuts or theoretical solutions. We believe in staying when complexity increases, taking ownership beyond the advisory phase, and carrying decisions through to execution. Our approach reflects that.
Senior execution only
No juniors, no overhead. You work directly with the partner guiding your trajectory from day one.
Technology-independent
Every decision is based on what fits your architecture, not ours.
Continuity-driven
Security must strengthen operations, not disrupt them. Reliability is a prerequisite.
Long-term ownership
We stay involved throughout the trajectory. Not just to design the solution, but to ensure it works, holds, and evolves.