TERA IT

Service

Cybersecurity & Compliance

Security isn't a layer you add at the end. We build it into the architecture from the first design decision.

The problem

Security bolted on at the end is the most expensive kind.

Security spending rarely fails because it was too small. It fails because it was spent on products rather than on architecture - so an organisation ends up with twelve consoles, overlapping licences, and a flat network in which one compromised laptop can still reach the systems that would genuinely hurt.

Detection & response

Detection follows visibility: you cannot alert on a segment nobody is watching. The value is not the number of alerts generated but how quickly a real one is recognised, contained, and evidenced - which depends on tuning nobody sells you with the licence.

The mistake: buying tools instead of building architecture

A new threat appears, a tool is purchased, and it joins the pile. The result is a dozen consoles, overlapping licences, alerts nobody triages, and a false sense of coverage. Meanwhile the actual architecture - flat networks, unsegmented OT, over-trusted identities - stays exactly as it was.

What it costs

Detection you own but never tuned. Compliance evidence assembled by hand the month before an audit. And the gap that matters most: an attacker who lands on one endpoint can reach the systems that would actually hurt you, because nothing between them says no.

-68%

mean time to detect after a Zero Trust rollout

Before

Flat network, tool sprawl

  • Flat network
  • Untuned alerts
  • Manual evidence
  • Shared credentials

After

Segmented, tuned, evidenced

  • Segmentation
  • Tuned detections
  • Continuous evidence
  • Verified identity

Our approach

What we do differently

We start with the architecture and the real risk, then choose the smallest set of controls that closes it. Security becomes a property of how the environment is built, not a layer of products sitting on top of it.

What good looks like

A global manufacturer's IT and OT networks had converged with no segmentation. We implemented Zero Trust across identity, network, and endpoints for 18 facilities. Mean time to detect dropped 68%, and the next third-party assessment returned zero critical findings.

  1. 1Assess against a real threat model, not a generic checklist
  2. 2Segment identity, network, and OT so a single compromise stays contained
  3. 3Deploy and actually tune Microsoft Defender and Sentinel - detections you'll act on
  4. 4Map controls to your frameworks so compliance evidence is produced continuously
  5. 5Run detection and response 24/7, or hand it over to your team with runbooks

In depth

The detail behind the summary

Expand any chapter for the full reasoning - the failure modes we see most, why they happen, and what we do about them.

Tool sprawl is a symptom, not a strategy

The pattern is familiar because the incentives produce it. A new class of threat gets attention, a product is evaluated and purchased, and it joins the estate. Nobody retires the previous answer, because retiring it requires proving it is redundant and no one has the time. Repeat over several years and several security leaders.

What you end up with is genuine coverage on paper and poor coverage in practice. Consoles nobody logs into daily. Agents competing for the same endpoint hooks. Overlapping licences where two products do 80% of the same job and the remaining 20% of each is unconfigured. Alerts flowing to a queue that exceeds the team's capacity to triage, which means the alerts are effectively off.

Meanwhile the architecture underneath has not changed. The network is flat, so lateral movement is unimpeded. Identity is over-trusted, so one credential opens many doors. Operational technology sits on the same broadcast domain as the corporate estate because that is how it was cabled in 2011. None of the purchased products address these, because they are not products - they are decisions about how the environment is built.

Our first move on almost every engagement is an audit of what you already own and what it is actually doing. It is common to find substantial unconfigured capability inside existing Microsoft licensing - Defender workloads, Entra features, Purview classification - that closes real gaps at no additional spend. Recommending a purchase before that audit would be a disservice.

The uncomfortable audit question

For each security product you pay for: who looked at its console this week, and what did they do as a result? Anything without an answer is shelfware regardless of how good the product is.

Segmentation, and why it is the control that actually limits damage

Most controls reduce the chance of an intrusion. Segmentation reduces what an intrusion is worth. Those are different jobs, and organisations consistently overspend on the first and underspend on the second - which is why breach post-mortems so often describe an initial foothold that was unremarkable followed by lateral movement that was trivial.

Segmentation is not only a network concern. There are three planes that matter and they interact. Network segmentation limits which systems can reach which. Identity segmentation limits which accounts can administer what, and prevents a single tier of credentials spanning workstations, servers and domain controllers. Data segmentation limits which classified information a given context can read at all.

Operational technology deserves specific attention because the failure mode is different. IT and OT networks have converged in most industrial environments, usually informally, driven by a genuine need for production data in business systems. The result is that a phishing email can reach a control network that was designed on the assumption of physical isolation, and where patching a device may not be possible at all. Segmentation is frequently the only available control.

The work is unglamorous: mapping real traffic flows before writing rules, staging enforcement so a wrong rule does not stop production, and accepting that the first pass will be more permissive than the eventual target. It is also the work that determines whether your next incident is contained to a subnet or becomes a board matter.

Detections you will actually act on

A SIEM deployed and left at default settings produces an enormous volume of low-quality signal. The team learns, correctly, that most alerts are noise, and the organisation acquires an expensive tool that has trained its own analysts to ignore it. This is worse than not having it, because it creates documented evidence that you were alerted.

Tuning is the entire job, and it is continuous rather than a deployment task. It means suppressing the benign patterns specific to your environment, enriching alerts with the context an analyst needs to decide in seconds rather than minutes, and writing detections against the behaviours that matter for your threat model rather than every technique in the catalogue.

It also means being honest about severity. An alert that is only actionable during business hours should not page someone at 3am; an alert that indicates active credential abuse should. Getting that distinction right is what makes on-call sustainable, and sustainable on-call is what makes response times real.

We measure this rather than assert it. Mean time to detect, mean time to contain, alert-to-incident ratio, and the proportion of incidents found by monitoring versus reported by users. Those four numbers tell you whether a security operation is working far better than a coverage matrix does.

What we report

Including the detections that fired and turned out to be nothing, and what we changed as a result. A monthly report showing only successes is a report that has stopped being useful.

Compliance as a by-product, not a project

Most organisations experience compliance as an annual crisis: a month of screenshotting configuration, chasing owners for policy documents, and reconstructing who approved what. It is expensive, it consumes the same engineers who would otherwise be improving things, and it produces evidence of a moment rather than of a practice.

The alternative is to instrument the controls so evidence accumulates continuously. If access reviews run on a cadence and the platform records the decisions, that is the evidence. If configuration is deployed as code through a reviewed pipeline, the pipeline history is the change record. If policy is enforced technically rather than documented aspirationally, the enforcement logs are the proof.

This is why we map controls to your frameworks - ISO 27001, SOC 2, NIST CSF, HIPAA, PCI DSS - at design time rather than afterwards. Knowing which control a given configuration satisfies means the audit conversation becomes a query against systems you already run.

We will not tell you that an engagement makes you compliant. Certification is granted by an assessor against evidence, and it depends on organisational practices well beyond technology. What we will do is build controls that genuinely operate and produce the evidence that they do, which is the part most organisations find hardest.

What you actually get

Concrete deliverables, not a statement of intent. Each one is something that exists at the end of the engagement and that your team owns afterwards.

Threat-model-based assessment

An assessment against how your organisation would realistically be attacked given your sector, estate and exposure - rather than a generic checklist scored out of a hundred.

Existing-capability audit

What your current licences and products already entitle you to, what is configured, and what is paid for but dormant - completed before any new purchase is discussed.

Segmentation design and rollout

Identity, network and OT segmentation designed against observed traffic, staged so enforcement does not interrupt production, with the boundary rules documented and owned.

Tuned Defender and Sentinel deployment

Detections written and tuned for your environment, with severity mapped to a response model your team can actually sustain, and suppression rules documented rather than silently applied.

Control-to-framework mapping

Every control mapped to the frameworks you are held to, with evidence generated continuously by the systems themselves instead of assembled by hand before each audit.

Incident response runbooks

Tested playbooks for the scenarios most likely to affect you, including containment authority, communications, and the decisions that need to be pre-agreed rather than made at 3am.

When this isn't the right engagement

  • If you need a penetration test or a point-in-time certification report, that is a different and much cheaper engagement - we will point you to it rather than sell you an architecture programme.
  • If there is no mandate to change network or identity architecture and the expectation is that a product purchase will close the gap, we will disagree with the premise and you should expect that.
  • If you want a managed SOC with no tuning phase, we can do it, but the first two months will be noisy and we would rather set that expectation than surprise you with it.

Questions we get asked

Where should we start if we're behind?
Identity and endpoint, in that order. They're where the overwhelming majority of intrusions begin, and they give the fastest measurable reduction in exploitable surface.
Can you work with the security tools we already own?
Yes, and usually you own more capability than you're using - particularly inside existing Microsoft licensing. We audit that before recommending anything new.
Does this make us compliant?
Compliance is an outcome of controls that genuinely operate. We map what we build to ISO 27001, SOC 2, NIST, HIPAA or PCI DSS and produce the evidence continuously - but we won't claim a certification we haven't earned for you.

Want to know where you actually stand on cybersecurity & compliance?

Book an assessment

What we deliver

TeraIT delivers security architecture, assessments, and managed detection built around Zero Trust principles and the Microsoft security stack. We help organizations understand real risk, close critical gaps, and maintain a defensible compliance posture.

Zero Trust
Never trust, always verify - applied across identity, device, and network.
Security Assessments
Architecture reviews, penetration testing, and maturity benchmarking.
Microsoft Security
Defender suite, Sentinel, and Purview deployment and tuning.
Endpoint Protection
Modern EDR/XDR deployment across the entire device fleet.
Identity Security
Hardening the identity plane against credential-based attacks.
Cloud Security
Posture management and workload protection across cloud estates.
Security Architecture
Reference architectures aligned to Zero Trust and defense-in-depth.
Compliance
Alignment to ISO 27001, SOC 2, NIST, HIPAA, and PCI DSS frameworks.
Risk Assessments
Quantified risk analysis tied to business impact.
Managed Security
24/7 detection, triage, and response operations.

Outcomes

  • Documented reduction in exploitable attack surface
  • Audit-ready compliance evidence and reporting
  • Faster mean time to detect and respond to incidents