Trust is no longer assumed.It is engineered, measured,and continuously proven.
Nucleus Systems helps enterprises, governments and financial institutions build trust across cybersecurity, AI, software, identity and payments, then prove it on a continuous basis.
End-to-end application security. Built for scale.
Enterprise-grade security without enterprise pricing.
Paxley secures every commit, pull request and release across your software supply chain. It is GitHub-native, priced by repository rather than per developer, and built for a future where AI writes more of the code.
Cost disruption
Repo-based pricing, not per seat. Security scales with your code, not your headcount.
Developer experience
GitHub-native with real-time pull-request scanning and low-noise, high-signal alerts.
Unified security view
Code, dependencies, infrastructure and governance in one dashboard.
AI-enhanced security
AI-assisted scanning, prioritisation and remediation, ready for AI-generated code.
SAST
Static analysis with deep dataflow and reachability, so you fix what is exploitable.
SCA
CVE detection and dependency vulnerability tracking across your supply chain.
SBOM & governance
SBOM generation and lifecycle, policy enforcement and audit reporting.
Secrets detection
Catch leaked keys and tokens before they ever reach a release.
IaC security
Validate infrastructure-as-code before anything is provisioned.
Container security
Scan container images and layers for known weaknesses.
License compliance
Flag licence conflicts across your full dependency tree.
Fast scans
Most scans finish in under five minutes, so security never blocks a release.
Most firms secure systems. We prove trust, continuously.
Trust is not a one-time audit result. It is a measurable state you engineer into the system, quantify against a baseline, then keep re-proving as the environment changes.
Build it in
We design trust into your architecture, governance and software delivery using proprietary control frameworks, not generic checklists.
Quantify the gap
We score your current state against a defined maturity model, so trust becomes a number leadership can track and report to the board.
Keep proving it
We move you from periodic assessment to continuous assurance, so trust is re-validated as threats, regulations and your systems evolve.
Six domains. One assurance standard.
Each pillar maps to a measurable trust outcome, delivered by specialists and underpinned by a Nucleus framework.
Cybersecurity Trust & Resilience
Maturity assessments, governance and resilience that hold up under real pressure.
- Fractional CISO
- Cloud security
- M&A cyber DD
- Continuity
AI Governance & AI Security
Govern and secure AI against the controls regulators now expect.
- ISO 42001
- EU AI Act
- Threat modelling
- AI risk
Code Trust & Software Assurance
Secure SDLC and supply chain assurance, from first commit to production.
- DevSecOps
- SBOM
- Repo security
- Secure delivery
Digital Identity & Trust Infrastructure
Identity assurance and verifiable credentials that scale across ecosystems.
- Verifiable creds
- Trust architecture
- Ecosystem security
Payment Security & DPI
Securing payment ecosystems and the digital public infrastructure underneath.
- Fintech advisory
- Inclusion
- DPI security
Post-Quantum Cryptography
Discover, prioritise and migrate cryptography before quantum makes it obsolete.
- PQC readiness
- Crypto discovery
- Crypto-agility
The instruments behind the index.
Four frameworks turn trust from an opinion into a score. Each defines controls, a maturity model and a repeatable assessment process.
Cybersecurity Maturity Management Framework
Benchmarks security maturity across domains and tracks improvement over time.
AI Governance Framework
Operationalises responsible AI against ISO 42001 and the EU AI Act.
AI Security Controls Architecture
A control set for securing AI systems, models and pipelines end to end.
Code Trust Assurance Framework
Measures and assures trust across the software supply chain.
Trust maturity model
Thirteen years of proving trust.
Founded
Nucleus Systems established with a single focus: making trust measurable.
NS-CMMF launched
Our first proprietary framework turns maturity into a trackable score.
M&A cyber practice
Cyber due diligence becomes a core service for private equity buyers.
Global scale
Engagements pass 300 across more than 25 countries.
AI assurance
NS-AIGF and NS-AISCA bring governance and security to AI systems.
Paxley platform
Code Trust Assurance gets its own platform layer.
600+ engagements
40+ countries, four frameworks, one continuously proven standard.
Where trust carries the most weight.
We work where a failure of trust is not an inconvenience — it is a systemic event.
Financial Services
Banks, insurers and asset managers where a trust failure triggers systemic regulatory action.
Government
Public institutions where digital trust is foundational to governance and citizen confidence.
Digital Public Infrastructure
National identity, payment rails and data exchanges that underpin entire economies.
Fintech
Regulated disruptors building trust at speed across payments, lending and digital wealth.
Healthcare
Patient data, clinical systems and AI diagnostics where trust is a matter of life.
Technology
Platforms, SaaS and AI companies proving security posture to enterprise buyers and boards.
Private Equity
Deal teams and portfolio companies managing cyber risk through M&A and ownership cycles.
Critical Infrastructure
Energy, water and transport operators where a breach carries national consequences.
A trust standard that travels.
From one methodology applied consistently across 40+ countries and six domains, a board in one market reads the same score a regulator reads in another.
Trust, proven.
Tell us where trust matters most in your organisation. We will show you how to engineer it, measure it, and keep proving it.
Engineer trustfor a living.
We are a team of specialists who would rather measure trust than talk about it. If you want your work to show up as a number a board acts on, you will fit in here.
Work that proves itself.
We hire people who care about evidence. Here is what you can expect in return.
Real frontier work
AI security, post-quantum, DPI. You work on the problems most firms are only starting to name.
Flexible by default
Hybrid and remote roles across regions, built around outcomes rather than hours at a desk.
Certifications funded
We back the credentials that matter, from CISSP to ISO 42001 lead, and the time to earn them.
Measured growth
Clear progression mapped to skill, with the same rigour we bring to client maturity models.
Small, senior teams
You work alongside experts, not layers of management. Your name is on the assessment.
Global, balanced
Competitive packages, generous leave, and travel only when it genuinely moves the work forward.
No opportunities at the moment.
We are not actively hiring right now. We still review every application, so if you can prove trust, introduce yourself and we will reach out when the right role opens.
Don't see your role?
We are always interested in people who can prove trust. Tell us what you do best.
Projects, pipeline and progress.
A single view of active engagements, the opportunities in conversion, and where each one sits in the trust lifecycle. Illustrative internal view.
Engagement timeline
Jan – Jun 2026 · phases: engineered → measured → provenEngagements
Proof activity
continuousLet's prove it.
Tell us where trust matters most in your organisation. We will come back within one business day to set up a briefing.
Thank you. Your enquiry is in.
A Nucleus specialist will be in touch within one business day to set up your briefing.