One focus. Keeping your identities, access, data and architecture secure.
Every service Nimbus Cyber delivers is built around a single conviction — that identity is the primary control plane of modern security. Whether we are redesigning your cloud RBAC model, implementing privileged access governance, preparing your organisation for NIS2, or securing your Microsoft Copilot deployment, the starting point is always the same: who has access to what, under what conditions, and whether that access is justified, governed and defensible. Below is what each engagement actually involves — and what it delivers for your organisation.
Identity Security & Access Governance (IGA)
Your identity lifecycle is either governed or it is a liability. Most organisations discover which one too late.
THE PROBLEM
A breach does not begin with a sophisticated attack. It begins with an access right that should not exist — a stale account from an employee who left six months ago, a contractor with standing admin access that was never removed, a service account with permissions far beyond what any legitimate process requires. IGA eliminates these entry points systematically, before they are exploited.
WHAT WE DO
Joiner — Secure from day one
Every new identity entering your organisation is a potential risk if onboarding is not governed correctly. We design automated provisioning workflows that enforce birthright access rules from the moment a new user, contractor or system account is created. New identities receive only the access their role requires — nothing more. Role-based architecture ensures consistency, auditability and zero manual intervention.
Mover — Access that follows the role, not the person
Internal transitions are where privilege creep originates. When an employee changes role, moves to a new team or takes on temporary responsibilities, their old access rarely gets removed. Over time, identities accumulate entitlements far beyond what their current role justifies. We implement dynamic role adjustment and continuous access reviews that ensure access rights change when the role changes — automatically, consistently and with a full audit trail.
Non-Human Identity — The governed attack surface most organisations ignore
Service accounts, API keys, and automated bots often possess sprawling permissions while bypassing traditional security reviews. Our methodology focuses on identifying these high-risk machine identities and applying automated governance protocols that restrict their access to exactly what is necessary. We ensure these non-human actors are integrated into your lifecycle management to prevent silent exploitation and satisfy modern regulatory standards.
WHAT YOU GET
Managed non-human identity governance
Every service account, managed identity, and API credential is governed with the same rigour as human users. Lifecycle management ensures every non-human identity is provisioned with purpose, reviewed continuously, and retired instantly.
Full visibility and control
Eliminate the sprawl of ungoverned service principals and CI/CD tokens that outnumber your staff. We ensure every identity has a clear owner and no longer operates in the shadows.
Enforced least privilege model
Stop the silent accumulation of excessive permissions. We implement strict entitlement reviews and automated enforcement to ensure every non-human identity has exactly the access it needs to function—and nothing more. Proven and defensible.
Cloud Security Assessments
Cloud environments are not secure by default. The gap between running and secure is where breaches happen.
THE PROBLEM
Most organisations assume their cloud environment is secure because it is operational. It is not. Default configurations are built for convenience, not security. Without deliberate hardening, continuous governance and alignment to regulatory requirements, cloud environments drift into a state of invisible risk — misconfigurations, excessive permissions, ungoverned access and overlooked controls accumulating silently until an attacker or an auditor finds them first.
WHAT WE DO
Layer 01 — Identity & Access Review
We examine every identity with access to your cloud environment — human and non-human. Over-permissioned roles, standing admin access, orphaned accounts, unreviewed service principals and excessive RBAC assignments are identified and prioritised. This is consistently where the most critical findings emerge.
Layer 02 — Configuration & Hardening
Cloud platforms ship with default configurations optimised for convenience, not security. We evaluate your environment against industry benchmarks — CIS, Microsoft Security Baseline and sector-specific regulatory requirements — identifying every misconfiguration, disabled security control and hardening gap that leaves your environment exposed.
Layer 03 — Data Exposure & Governance
Sensitive data stored in cloud environments is frequently accessible far beyond what business requirements justify. We identify oversharing, misconfigured storage permissions, ungoverned data access and sensitivity labelling gaps — particularly critical for organisations deploying or planning to deploy Microsoft 365 Copilot.
WHAT YOU GET
REGULATORY & COMPLIANCE ALIGNMENT
We map your current cloud security posture against the regulatory frameworks applicable to your organisation — NIS2, DORA, ISO 27001 and sector-specific requirements. Every finding is tagged against the relevant obligation, giving your compliance and audit teams a clear, evidence-based picture of where you stand.
Prioritised findings report
Every identified risk ranked by severity and business impact — not just technical score. Your team knows exactly what to fix first and why.
Remediation roadmap
A structured action plan with clear ownership, realistic timelines and measurable outcomes. Not a list of vulnerabilities — a plan your team can execute immediately.
Zero Trust Architecture
Zero Trust starts with identity — not the network. Most organisations have it completely backwards.
THE PROBLEM
Most Zero Trust programmes begin with network segmentation — micro-perimeters, firewall rules, VLAN architecture. That is the wrong starting point. In a cloud-first world, the network is no longer the control plane. Identity is. Every serious breach today begins with a compromised credential, an over-privileged account or a service principal with standing access it should never have had. Building Zero Trust from the network outward is building on the wrong foundation.
WHAT WE DO
Identity-first Zero Trust design
We start where Zero Trust must start — with identity. Who is accessing what, under what conditions, with what level of verified trust. We design Conditional Access policy architecture that enforces explicit verification at every access decision point — user, device, location, risk signal and application sensitivity all factored into every authentication decision.
Elimination of implicit trust
We identify and eliminate every instance of implicit trust in your environment — standing admin access, legacy authentication protocols, overly permissive network paths and unverified device access. Every connection is treated as untrusted until explicitly verified. Legacy authentication mechanisms are replaced with modern, risk-based alternatives that do not compromise operational continuity.
Structured Zero Trust roadmap
Zero Trust is not a single project — it is a programme. We deliver a phased, prioritised roadmap that moves your organisation from your current state to a mature Zero Trust posture in a sequence that is practical, sustainable and aligned to your operational reality. No big-bang transformation. No disruption to business operations. Each phase delivers measurable security improvement while building toward the complete architecture.
WHAT YOU GET
Zero Trust maturity assessment
A clear picture of where your organisation sits today across every Zero Trust pillar — identity, devices, applications, data, infrastructure and network. You know exactly where you are starting from and what needs to change first.
Phased implementation roadmap
A practical, sequenced plan that prioritises the highest-impact controls first — starting with identity — and builds toward a mature Zero Trust posture without disrupting operations. Each phase has clear objectives, timelines and measurable outcomes.
Defensible access architecture
Every access decision explicitly verified. No implicit trust remaining. A security posture that holds under real attack conditions and satisfies the most rigorous audit and regulatory scrutiny — NIS2, DORA and ISO 27001 aligned.
Privileged Access Security (PAM)
When a privileged account is compromised, the blast radius is total. This is not a tool problem — it is an architecture problem.
THE PROBLEM
Privileged accounts are the master keys to your entire environment. Every serious attacker — ransomware group, nation-state actor, insider threat — targets them first because compromising a single privileged account delivers unrestricted access to everything it controls. Most organisations manage privileged access reactively, with standing permissions, no tiering model, no hardened admin devices and no session governance. That is not a security posture. It is an open door.
WHAT WE DO
Administrative tiering model
We design and implement a structured tiering model that separates administrative access by sensitivity level — Tier 0 for domain controllers and identity infrastructure, Tier 1 for servers and applications, Tier 2 for workstations and end-user devices. Each tier operates with strict access boundaries. Credentials from a lower tier never touch a higher tier asset. Lateral movement between tiers becomes architecturally impossible rather than just policy-restricted.
Hardened admin devices
Administrative tasks must be performed from dedicated, hardened devices — not from the same workstation used for email and web browsing. We design and implement Privileged Access Workstation (PAW) architecture that ensures every admin role operates from an environment specifically hardened against the threats targeting privileged users. A compromised standard workstation cannot reach privileged systems. The attack surface for credential theft is dramatically contained.
Just-In-Time & Just-Enough-Access
Standing privileges are eliminated. Admin access is granted on demand, for a specific purpose, for a defined time window — and automatically revoked when the window closes. We implement JIT and JEA controls across all privileged roles using Microsoft Entra Privileged Identity Management, with approval workflows, justification requirements and full audit trails. No admin account retains permanent elevated access. Every privileged action is time-bound and purposeful.
WHAT YOU GET
Session monitoring & lifecycle governance
Every privileged session is monitored, recorded and reviewable. Privileged account lifecycle is governed with the same rigour as any other identity — provisioned with purpose, reviewed continuously and de-provisioned immediately when no longer required. Both human and non-human privileged identities are covered — service accounts, managed identities and automation credentials receive the same governance treatment as administrative user accounts.
Elimination of standing privileges
No admin account retains permanent elevated access. Every privileged action is time-bound, purpose-driven and fully auditable. The attack surface for credential theft and lateral movement is dramatically reduced across your entire environment — on-premise and cloud.
Structured tiering architecture
A clear, defensible administrative model that contains the blast radius of any credential compromise — preventing lateral movement from low-tier to high-tier assets. Even if an attacker gains a foothold, the damage is contained by architectural design rather than hoping a policy is followed.
Microsoft Copilot Security Readiness
Copilot accesses everything your users can access. If your permissions model is broken, it will surface data you never intended to share.
THE PROBLEM
Microsoft 365 Copilot is one of the most powerful productivity tools available to enterprise organisations today. It is also one of the fastest ways to expose sensitive data at scale. Copilot operates within the permissions of the user — it can access, summarise and surface any content that user can reach. In most M365 environments, that means years of accumulated oversharing, misconfigured permissions, excessive access rights and ungoverned sensitive data are suddenly queryable by anyone with a Copilot licence. Most organisations deploying Copilot have not assessed whether their permissions model is ready for it. Many discover the risk after deployment — when the damage is already done.
WHAT WE DO
M365 permissions posture assessment
We assess the current state of your Microsoft 365 permissions model — SharePoint, OneDrive, Teams, Exchange and connected applications. We identify oversharing, excessive access rights, ungoverned sharing links, guest access exposure and any permissions configuration that would allow Copilot to surface sensitive data inappropriately. You get a complete picture of your current data exposure risk before Copilot surfaces it for you.
Sensitivity labelling & data governance
We design and implement a sensitivity labelling framework that classifies your data correctly and applies appropriate access controls automatically. Sensitive data is protected at the source — not dependent on users making correct sharing decisions. Labels are applied consistently across your M365 estate, ensuring that Copilot respects data classification boundaries and cannot surface restricted content to unauthorised users.
Access control remediation
We remediate the permissions issues identified in the assessment — removing excessive access rights, cleaning up oversharing, enforcing least privilege across your M365 estate and establishing governance processes that prevent permissions drift from recurring. Every remediation action is documented so your audit and compliance teams have a clear before-and-after picture of the work completed.
WHAT YOU GET
Copilot governance framework
We establish the ongoing governance framework that keeps your Copilot deployment safe after the initial remediation — access reviews, sensitivity label policies, monitoring and alerting for anomalous data access, and clear acceptable use policies for Copilot within your organisation. Security does not end at deployment. It requires continuous governance to remain effective as your environment and data grow.
Copilot-ready permissions model
A Microsoft 365 environment where Copilot can be deployed with confidence — every user accessing only what they should, sensitive data protected at the source, oversharing eliminated and data governance controls in place before the first Copilot query is made.
Data exposure risk report
A clear, detailed picture of what data is currently exposed, to whom, and what the Copilot risk surface looks like before and after remediation. Your board, legal team and compliance function have the evidence they need to make informed deployment decisions.
Fractional CISO &
Regulatory Advisory
Every organisation needs senior security leadership. Not every organisation needs a full-time CISO.
THE PROBLEM
Security decisions made without senior security leadership are almost always the wrong decisions — too technical for the board, too strategic for the IT team, too expensive when made reactively and too costly when made incorrectly. NIS2, DORA and ISO 27001 all mandate board-level accountability for cybersecurity. Without a senior security voice at the leadership table, that accountability falls on people who were never equipped to carry it. The result is a security programme that satisfies nobody — not the board, not the auditors and not the regulators.
WHAT WE DO
Security strategy & governance
We provide ongoing security strategy advisory — helping your board and executive team understand the threat landscape, make informed risk decisions and build a security programme that is proportionate, sustainable and aligned to your business objectives. We attend leadership meetings, present to boards and act as the authoritative security voice your organisation needs at the table. Complex security decisions are translated into clear business language. Business requirements are translated back into precise security architecture.
NIS2 & DORA compliance advisory
We guide organisations through NIS2 and DORA compliance — from initial gap assessment and readiness evaluation, through remediation roadmap development, to ongoing compliance monitoring and board reporting. We translate regulatory obligations into security controls that actually work — not policy documents that gather dust between audits. Your board has the evidence it needs. Your regulators have the controls they require. Your organisation is genuinely resilient, not just documented as such.
ISO 27001 implementation support
We support organisations through the full ISO 27001 implementation journey — scope definition, risk assessment, control selection, policy and procedure development, internal audit preparation and certification readiness. We ensure the Information Security Management System you build is genuinely functional and defensible — not a paper exercise designed to pass a single audit and then sit on a shelf. Your ISMS works in practice, not just on paper.
WHAT YOU GET
Senior security leadership on demand
A trusted, experienced security advisor at your leadership table — without the cost, recruitment timeline or overhead of a full-time CISO hire. Engagements are structured around your needs — monthly retainer, project-based or on-call advisory. Available in English and Greek across Europe.
Regulatory compliance roadmap
A clear, actionable path to NIS2, DORA and ISO 27001 compliance — built with genuine architectural intent, not checkbox documentation. Your board has the evidence it needs. Your auditors have the controls they require. Your organisation is prepared for enforcement, not caught off guard by it.
Security programme that scales with your business
A security governance framework built to grow with your organisation — policies, controls, processes and board reporting that remain relevant and effective as your threat landscape, regulatory obligations and business requirements evolve. Security that works today and remains defensible tomorrow.
Seen a service that fits your challenge? Let's talk about it.
Book a free 30-minute Security Diagnostic Call with Kostas. Select the service area you want to discuss and we will come prepared with specific, relevant insights — not a generic presentation. Engagements begin with this conversation and move to a tailored written proposal.