About GreyHex
Founded to make enterprise-grade security accessible
GreyHex Technologies was built by practitioners who spent years defending some of the world's largest institutions — and saw how inaccessible that level of rigor was for everyone else.
We started GreyHex with a simple premise: security advice should be evidence-based, business-aware, and delivered by people who have actually done the work — not generated by a template. Today we partner with organisations across finance, healthcare, manufacturing, and technology to reduce real risk, not just produce reports.
What we stand for
Our values
Precision over noise
We report what matters, backed by evidence — never scanner output dressed up as insight.
Partnership, not procurement
We work as an extension of your team, not a vendor that disappears after the report is delivered.
Global standards
Every engagement is grounded in internationally recognised frameworks and methodology.
Accountable outcomes
We measure our success by your risk reduction, not billable hours.
Leadership
The team behind GreyHex
Alexandra Voss
Chief Executive Officer
20+ years leading security programs for global financial and healthcare institutions before founding GreyHex.
Marcus Reyes
Chief Technology Officer
Former principal security engineer at a Fortune 500 cloud provider, now leading GreyHex's technical methodology.
Priya Nair
VP, Offensive Security
OSCP and CREST-certified red team lead with a background in nation-state threat emulation.
Daniel Osei
VP, Client Services
Bridges technical delivery and executive stakeholders across GreyHex's largest enterprise engagements.
Certifications & Standards
Let's Secure Your Business
Book a consultation with our team and get a clear, prioritised view of your security posture — no obligation, no jargon.