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Offensive security laboratory

Every system keeps time. We find the drift.

Greenwich Security Labs is a research-led team of offensive engineers. We test applications, cloud, identity and infrastructure the way capable adversaries do, and we stay until the gaps are closed.

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Greenwich Security Labs astronomical clock mark
Approach
Manual, adversary-led testing. Tools assist, people decide.
Coverage
Web, API, mobile, cloud, Kubernetes, identity, CI/CD.
Deliverable
Proof of impact, ranked fixes and a free retest.
Reach
Remote worldwide, on site by arrangement.
00 / Premise

Greenwich is where the world agreed what time it is. We bring the same discipline to security: one precise reference for how exposed you really are.

01 / Services

Eight disciplines. One standard.

Commission a single assessment or build a continuous programme. Each engagement is scoped to your risk, not to a template.

I Penetration testing Web applications, APIs, mobile and networks, tested by hand. We chain small findings into the paths a real attacker would take. II Security reviews Architecture, design and source code review with threat modelling. Catch the flaw in the diagram, before it ships. III Security strategy and secure development Security programmes designed around your risks and maturity, including a Secure SDLC with processes, owners, metrics and a roadmap to put it in place. IV Cloud and Kubernetes AWS, GCP and Azure configuration and IAM, plus cluster, workload and container boundary testing down to the node. V Red team operations Objective-driven campaigns against people, process and detection. Find out what your defenders see, and when. VI Identity and access SSO, OAuth and OIDC flows, LDAP and directory services, and the trust relationships quietly connecting them. VII CI/CD and supply chain Pipelines, runners, secrets and dependencies. Every route from a developer's commit to your production systems. VIII Workshops and training Hands-on courses for engineering and security teams, taught by the consultants who run our engagements. Real techniques in prepared labs, not slides.
Featured workshop

Vulnerability hunting with AI.

A practical, eight-hour workshop on applying AI tools and techniques to find security vulnerabilities. It is taught by the consultants who lead our penetration tests, using worked examples and lab environments built for the course.

Book it on its own, or add it to an engagement so your team keeps the method after we leave. We also build custom training around your stack.

GSL-WORKSHOP-018 hours · hands-on
  1. 01Foundations of AI-assisted vulnerability hunting
  2. 02Setting up and using AI tools for security analysis
  3. 03Source code analysis and spotting likely vulnerabilities
  4. 04Scripts and automation to support security testing
  5. 05Lab exercises: find and validate real vulnerabilities
Format
Lab-based, practical
Audience
Developers, security teams
Instructors
Our pentest leads
02 / Method

A clear clock, from first call to proof of fix.

T+00 · XII

Scope

We agree targets, rules of engagement and timing on one call. You receive a fixed proposal before any work begins.

T+01 · III

Operate

Senior engineers test by hand with our own tooling. Critical issues are raised the same day through a shared channel.

T+02 · VI

Report

An executive narrative plus technical findings with reproduction steps and fixes ranked by effort and risk.

T+03 · IX

Verify

We retest every fix and reissue the report, so you hold evidence of closure for auditors, customers and your board.

What you receive

Findings written for the people who fix them.

Each issue carries its business impact, a reproducible proof, and a remediation your engineers can merge. No scanner noise, no padding.

GSL-EXAMPLE-014Illustrative finding
Critical CI runner token reachable from pull requests
Impact
Production deploy
Path
Fork → runner → registry
Fix effort
Low
$ step 1 open PR from fork with modified workflow $ step 2 read mounted runner credentials ! step 3 push signed image to release registry
03 / From the lab

Research we pursue.

The questions we work on between engagements. What we learn here ends up in your report and in our workshops.

AI-assisted hunting
Teaching models to read code like an attacker
Where language models speed up vulnerability discovery, where they hallucinate, and how to keep a human deciding.
Microarchitecture
When the hardware keeps its own time
Timing and transient-execution side channels in shared and multi-tenant infrastructure.
Containers
Breaking the boundary you trust
Escape paths from misconfigured workloads, runtimes and admission controls to the node and beyond.
Identity
Trust nobody remembers granting
OAuth, OIDC and directory trust chains that quietly turn one compromised account into many.
Greenwich panther mark
04 / The team

Quiet. Precise. Patient.

Research-led
We study how systems fail at a low level and build our own tooling, so we reach what scanners cannot.
Senior hands only
The two consultants on your scoping call run the engagement themselves. Nothing is handed to junior staff.
Discreet by default
NDAs as standard, encrypted evidence handling, data destroyed at close.
Knowledge transfer
Every engagement closes with a walkthrough for your engineers. Your team keeps the method, not just the report.
Who you work with

Two senior consultants. No hand-offs.

International experience assessing applications, APIs and distributed services that handle very high traffic and terabyte-scale data.

19+
Years combined
39
CVEs published
2
Exploit certifications: OSED, GXPN
LATAM
Banking engagements
Consultant 0112+ years

Principal Security Engineer

Former penetration testing engineer at a major cloud provider, now leading offensive security and detection at a global trading platform across cloud, Kubernetes and identity. Has tested major Latin American banks and published research on low-level vulnerabilities, identity systems and container security.

CloudKubernetesIdentityDetection
Consultant 027+ years

Senior Penetration Tester

Leads security assessments of distributed services, APIs and cloud infrastructure at a major cloud provider, finding complex authorisation and business-logic flaws. Author or co-author of 39 CVEs.

OSEDGXPNAPIsExploit development
05 / Contact

Set your reference point.

Tell us what you need tested or taught. We reply within one business day with questions and a proposed scope.

hello@greenwichsec.io
Opens a pre-filled email to our team. Never shared.
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