Defensive security is a moving target, and an organisation's ability to respond is only as good as the engineering behind it.

Tools bought in isolation rarely add up to a defensible posture, because the value is not in the products themselves but in how they are designed, integrated, and operated against the specific environment. A SIEM nobody has tuned, an XDR platform wired to defaults, and an IDS in the wrong place generate noise rather than defence, and the gap only shows when something gets through.

Mesh treats threat defence as an engineering discipline. We start by understanding how the environment is actually built, where the real exposure sits, and what the existing team can run, then design controls that reinforce each other rather than stand alone.

Our Threat Defence offerings span:

Engineering

Mesh designs and implements the controls that make an environment defensible, integrated with what is already in place rather than added in isolation. The point is a posture that adds up, where each control reinforces the others; not a set of tools that each work alone. Services include:

• Vulnerability management platforms, configured to surface real exposure rather than raw severity counts

• Web and email security, tuned to the threats the organisation actually sees

• Security Information and Event Management (SIEM), with detections built for the environment rather than left at vendor defaults

• Extended Detection and Response (XDR), correlating signal across endpoint, identity, and network

• Intrusion detection and prevention (IDS and IPS), positioned where they add visibility without breaking traffic

• Encryption solutions for data in transit and at rest

Operations

Mesh runs the capability day to day, informed by threat intelligence and integrated with the organisation's own security operations team. Engagement scales from specialist support alongside an existing team through to a fully outsourced cyber operations function, so the model fits the capability the organisation already has rather than forcing a rebuild. Services include:

• Threat intelligence platforms and integration, feeding detection and response with context specific to the sector

• Security operations integration and support, working alongside existing teams and processes

• On-site specialist support for environments that cannot be run remotely

• CISO-as-a-Service support, giving security leadership without a permanent hire

• Fully outsourced Cyber Operations, where Mesh runs the function end to end

An effective Governance, Risk and Compliance (GRC) capability is the cornerstone of a successful cyber security program.

To ensure cyber security is a business enabler rather than a blocker, organisations need expert GRC services that go beyond ticking boxes. This is where Mesh comes in.

Mesh pairs the right certifications, including CISSP, CRISC, and Essential 8 Auditor, with hands-on technical delivery. That mix means we know how a control behaves once it is in place, not just how it reads in a framework. We size security to the environment, balancing confidentiality, integrity, and availability so the business can make informed decisions about the risk it carries.

Our Service Offerings cover:

Governance

Mesh builds the governance foundation that determines whether an uplift program gains traction or stalls. Services include:

• Strategic cyber security consulting and advisory

• Cyber and ICT policy development and refinement

• Security governance models and frameworks

• Security posture reviews against the ISM and other frameworks

• Cyber incident response planning

• Data and information asset classification

• Cyber security awareness training

Risk

Mesh runs risk assessments that help the business decide where to spend, balancing cyber security investment against business value. Services include:

• Security risk assessments (SRA)

• Supply Chain Security Assessments

• Security Risk Management Plans (SRMP)

• Privacy Impact Assessments (PIA)

• Third-party, cloud, and application cyber risk assessments

Compliance

Mesh produces compliance evidence that holds up under scrutiny, and clients consistently report faster ATO approval as a direct result of better artefacts and clearer risk-based decisions. Services include:

• CISO-as-a-Service (vCISO)

• IRAP assessment and assessment readiness (ASD-endorsed IRAP Assessors)

• Essentials assessments and uplift

• PSPF and ISM advisory and gap assessment

• Security documentation: SSP, SSP-A, SRMP, IRP, CMP

• System authorisation and Authority to Operate (ATO) support

• Technical configuration reviews and architecture pattern development

Critical infrastructure depends on IT networks that have evolved through legacy decisions, vendor access, and operational workarounds. The boundary between enterprise IT and operational technology is often blurred, remote access has been added piecemeal, and visibility across the operational environment is thin where it matters most.

Mesh specialises in the networks that run critical infrastructure, where IT meets operational technology.

We strengthen these networks grounded in real operational environments, where safety, availability, and continuity come first. Every change carries a defined rollback position and aligns to maintenance windows, so the work fits around operations rather than interrupting them.

Our Critical Infrastructure and OT service offerings include:

IT-OT Network Separation and Segmentation

Mesh builds and holds the boundaries between enterprise IT and operational environments. Services include:

• Purdue-aligned network zoning

• IEC 62443 zones and conduits with target Security Levels

• Industrial DMZ (IDMZ) design and brokered interfaces

• Default-deny conduit governance

Secure Access and Network Hardening

Mesh treats remote and vendor access as a controlled conduit, brokered and recorded rather than left open. Services include:

• Brokered privileged access through hardened jump hosts

• Phishing-resistant MFA, time-bound and recorded sessions

• Vendor access control terminating in the OT DMZ

• Network device and access pathway hardening

Network Visibility and Operational Readiness

Mesh establishes visibility across critical boundaries and integrates it into existing security and operations workflows. Services include:

• OT-aware monitoring, logging, and telemetry

• Out-of-band management resilient under degraded conditions

• Integration into SOC, SIEM, and incident response processes

Security Governance and Assurance

Mesh verifies that controls are implemented and functioning, where most assessments find their highest-risk gaps. Services include:

• Risk assessment against SOCI, AESCSF (SP-1 and SP-2), ISM, and PSPF

• IEC 62443 assurance

• CI Fortify and the Secure Connectivity Principles for OT

Cloud and AI environments tend to grow organically over time. Projects make decisions in isolation, identity models drift, and risk accumulates across data, identity, and platform, often without anyone holding a complete view of the whole picture.

Mesh has spent years designing and deploying secure cloud environments for Government. We build the controls in from the start, so security and governance are engineered as code from day one.

Our principals have delivered cloud and AI uplift across the Commonwealth and regulated industry, and we sequence change so teams can absorb it without halting delivery.

Our Cloud and AI service offerings include:

Secure Cloud Foundations

Mesh builds the landing zones, segmentation, and policy guardrails that remove implicit trust across critical systems. Services include:

• Landing zone design and implementation aligned to the ISM

• PROTECTED M365 design and implementation aligned to Blueprint for Secure Cloud

• Cloud workload migration and modernisation with a documented path to ATO

• Policy guardrails and infrastructure as code

Microsoft Security Stack

Mesh configures Microsoft security services so the controls map to obligations the organisation reports against. Services include:

• Microsoft Defender XDR and Defender for Cloud

• Microsoft Sentinel SIEM and SOAR

• Global Secure Access and External Attack Surface Management

• Microsoft Intune endpoint management aligned to the ISM and Essentials

Identity and Access Management

Mesh modernises identity and access toward least privilege, closing the default configurations and identity sprawl that are consistently the highest-risk pathways into cloud environments. Services include:

• Identity and access management (IAM) modernisation

• Privileged access management and Zero Trust architecture

• Identity governance and lifecycle management

AI and Data Governance

Mesh helps clients adopt AI without taking on risk they cannot see. Services include:

• AI risk management and AI solution architecture

• Responsible AI assurance

• Secure integration of Microsoft Copilot and enterprise AI tooling

• Data governance aligned to Government risk frameworks

Security capability is easy to buy and hard to run. Most organisations can stand up the tooling, but keeping it tuned, monitored, and patched as well as turning an alert at 2am into a clear decision takes a standing function that many would rather not build and maintain themselves.

Mesh designs and builds the cloud, security, and network platforms it operates. That means the team running your environment already understands how it was put together.

We run the security functions on your behalf, keeping it tuned, patched, and watched, and turning an alert into a decision at two in the morning. Services can be scoped from a single platform through to a fully outsourced operational layer.

Our Managed Security Services offerings are:

Platform and Endpoint Management

Mesh runs and maintains the platform and endpoint environment, keeping it patched and current against the obligations the organisation reports against. The team operating the environment is the same one that understands how it was built, so configuration drift and patch gaps get caught before they become exposure. Services include:

• Managed Azure and M365 platforms

• Managed Secure Internet Gateways

• Managed patching across server, endpoint, and mobile

Detection and Response

Mesh watches the environment around the clock and runs a defined path from signal to action, so an alert becomes a decision rather than a backlog item. Detections are tuned to the environment to cut the noise that buries real events. Services include:

• SIEM-as-a-Service, with detections tuned to the environment rather than left at vendor defaults

• Vulnerability management

• Managed Detection and Response (MDR)

Resilience

Mesh manages backup and recovery as an operational discipline, so the business can restore quickly when it matters. Recovery is tested, not assumed, against defined recovery objectives. Services include:

• Managed backup and disaster recovery

Networks accumulate history. Rule sets grow through years of one-off changes, remote access is bolted on as the business needs it, flat segments persist long after anyone remembers why, and temporary fixes become the production norm.

The result is a network that works but can't be understood with confidence: where the blast radius of a compromise, equipment failure, or admin mishap is far larger than it needs to be.

Mesh designs, implements, and hardens networks for Government and critical infrastructure, treating the network as a security control in its own right.

We work with the systems, teams, and vendor dependencies you already have, aligning changes to your maintenance windows and operational reality, so you finish with a network you can reason about and a blast radius contained by design.

Our Networks and Infrastructure offerings are:

Architecture and Segmentation

Mesh designs and implements clear boundaries between trust zones, removing the flat segments that let a single compromise spread across the network. Re-segmentation is done on live environments, sequenced so the business keeps running through the change. Services include:

• Network architecture design and implementation

• Network segmentation and micro-segmentation

• Re-segmentation of live environments, sequenced around maintenance windows

Hardening and Rule Rationalisation

Mesh brings accumulated firewall and device configuration back to what the business actually needs, stripping the one-off rules and standing exceptions that nobody can account for. Every change carries a defined rollback position. Services include:

• Firewall and network device hardening

• Firewall rule base review and rationalisation, with redundant and unused rules retired

• Identity and access controls aligned to operational roles

Secure Connectivity

Mesh treats connectivity and security as a single design decision rather than two bolted together, so remote and site access is controlled rather than added piecemeal. Designs assume the vendor platforms and dependencies already in place. Services include:

• SD-WAN design and implementation

• Security Service Edge (SSE)

• Secure remote access design