No assumptions. No open doors. Only the right people, with the right access, at the right time.

Traditional security models rely on trust. Once you’re inside the network, you’re trusted.

Traditional security models rely on trust. Once you’re inside the network, you’re trusted.

But that model no longer works. Teams are hybrid. Threats are everywhere. Breaches often come from the inside.

Zero Trust flips the model.

Nobody is trusted by default. Every user, device, application and connection must prove who they are and why they belong — every time.

At LeftBrain, we help fast-moving businesses design and implement Zero Trust security architecture that reduces risk, protects data, and aligns with how modern teams work.

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What is Zero Trust?

Zero Trust is a security framework that assumes no one inside or outside the network is automatically trusted.

Access is granted based on strict identity checks, verified context and continuous validation.

It’s not one tool or product. It’s a strategy built from multiple layers working together.

Key Zero Trust principles:

• Never trust, always verify
• Least privilege access by default
• Context-aware policies (based on role, device, location and risk level)
• Continuous monitoring and response
• Segmentation between apps, users and data

It applies across your infrastructure — cloud services, internal apps, local devices and networks.

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Why Zero Trust matters now

The workplace is no longer a single building. Your users are working from offices, homes, co-working spaces and everywhere in between.

Your data is spread across tools like Google Drive, Dropbox, Microsoft 365, Notion, Slack and more.

If one compromised password can unlock all of it, you’re relying on luck — not security.

Zero Trust helps you:

1. Prevent lateral movement if an account is compromised
2. Keep sensitive systems locked down by default
3. Protect company data on personal or unmanaged devices
4. Secure your cloud tools, even when accessed remotely
5. Limit the damage of human error or misconfiguration

This is security designed for the way modern businesses actually operate.

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How we implement Zero Trust at LeftBrain

You don’t need a huge security team to start building Zero Trust.

We break it down into clear, manageable steps.

Step 1: Assess current access controls

We start by asking:

• Who has access to what systems and data?
• How are those permissions assigned and removed?
• Are systems grouped by role or open to everyone?
• What tools are in place, and where are the gaps?

We often uncover over-permissioned users, dormant accounts, and access paths that no one is managing.

Step 2: Define trust boundaries

We map:

• What data is sensitive or business-critical
• Which systems and applications need to be segmented
• Which teams, roles or contractors need specific access
• Where access should require extra verification or alerts

This helps create clear policies that reflect your business structure — not just your software licenses.

Step 3: Build layered protections

We implement practical controls, including:

• Role-based access and group-based permissions
• Multi-factor authentication across all systems
• Device verification and mobile policy enforcement
• Conditional access rules (e.g. block access outside work hours or from unknown locations)
• Identity and access management (IAM) with proper offboarding procedures
• DNS filtering, VPN replacements and monitoring for suspicious behaviour

We do this using tools you already have where possible, like Google Workspace, Microsoft 365, Dropbox and Jamf.

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Tools we work with

We are not vendor-locked. We help you design Zero Trust architecture using:

• Google Workspace and Microsoft 365
• Cloud identity platforms like JumpCloud or Okta
• MDM tools like Jamf, Kandji or Intune
• File systems like Dropbox, SharePoint or Google Drive
• Password managers and endpoint controls
• DNS filtering and VPN alternatives
• Email security and user behaviour monitoring

Our goal is to make your existing stack more secure — not sell you new complexity.

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Compliance and certification

Zero Trust supports compliance with:

• ISO 27001
• Cyber Essentials and Cyber Essentials Plus
• SOC 2
• GDPR and other data protection frameworks

We help you:

• Document access policies
• Prove principle of least privilege
• Provide evidence of technical controls
• Align security architecture with risk appetite

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What this unlocks for your business

For IT and security teams

• Better control over access
• Stronger protection against internal threats
• Clear documentation and auditing

For leadership

• Lower risk of data loss or breach
• Simpler answers for client due diligence
• A future-proof security model that grows with the business

For your team

• Access to the right tools, no more and no less
• Protection without friction
• Confidence that security is being handled properly

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Why LeftBrain

We don’t treat Zero Trust as a buzzword or a checkbox.

We help you build a system that fits your business — your structure, your pace, your people.

That means:

• No one-size-fits-all templates
• No tech for the sake of it
• Just practical, thoughtful security design that makes sense and works

“We feel very lucky to be working with LeftBrain. Our Information Security Strategist has gone above and beyond: he’s clearly interested, invested and understands our business. We’ve worked very closely with various members of the team: the engineers are incredibly good at their jobs, and are also really lovely!”