Cybersecurity Consulting — Mayfair (W1)
Mayfair and the wider W1 area hold the UK's densest cluster of wealth managers, hedge funds, private equity, family offices and boutique professional services for HNW clients. Personal data held is sensitive (financial records, trust structures, beneficial ownership) and high-value to attackers. Gridisys delivers Mayfair-specific managed SOC, FCA wealth-management alignment, and high-touch ICO breach retainer.
W1 cluster
highest concentration of UK wealth managers + family offices
FCA Ops Res.
FCA PS21/3 — applies to all FCA-regulated wealth managers
24/7
Gridisys managed SOC for Mayfair firms — discreet, no contract
HNW focus
high-net-worth client data — high fraud-attack risk
Cybersecurity Consulting + 24/7 SOC Monitoring
Every Gridisys engagement is built on two pillars — strategic consulting to design the right controls, and managed SOC monitoring to keep them effective.
Cybersecurity Consulting
UK consulting engagements: risk assessment, security architecture, conditional access design, compliance (Cyber Essentials, UK GDPR, FCA PS21/3, NIS2), incident-response planning. Board-ready documentation, no jargon, no surprise invoices.
- Risk assessment + security architecture review
- Conditional access + Entra ID hardening design
- Cyber Essentials / UK GDPR / FCA / NIS2 compliance support
- Incident response planning + tabletop exercises
- Vendor + supply-chain security assessment
- Board / DPO reporting + evidence pack
Managed SOC Monitoring · 24/7
AI-augmented Security Operations Centre — continuous monitoring across Microsoft 365 / Entra ID, Defender, on-prem, and cloud. UK-based analysts, sub-hour triage on critical alerts. No long contract required.
- 24/7 SIEM monitoring — Microsoft 365, Entra ID, Defender, Azure, on-prem logs
- BEC + mailbox-compromise + OAuth grant abuse detection
- Suspicious sign-in + conditional access drift alerting
- Ransomware + lateral-movement detection from EDR + Defender
- Sub-hour triage on critical alerts, monthly ops report
- Optional + integrated with consulting engagements
Most engagements start with consulting (1-2 weeks), then SOC monitoring (ongoing ) keeps the controls effective.
Pricing tailored to your needs
Every engagement is scoped to your environment and requirements. Book a free consultation for a tailored quote — no obligation.
What we cover
Practical, board-ready consulting — no jargon, no surprise invoices.
Managed SOC for Mayfair firms
24/7 monitoring of M365 / Entra across deal teams, family office admin, relationship managers. Targets: dealing-rule email compromise on family office fund transfers (high individual-loss value), mailbox rule creation hiding fraud, OAuth grant abuse on portfolio systems (Advent / Geneva), after-hours admin sign-ins.
Operational resilience for wealth managers
FCA PS21/3 + EBA outsourcing rules for wealth managers: identify important business services (portfolio management, client statement delivery, transaction execution), set impact tolerances, document remain-within-tolerance tests. We scaffold in SMF24-friendly report.
Family office cyber + privacy
Single-family + multi-family offices (not strictly FCA-regulated where family-only) hold exceptionally sensitive personal + financial data — KYC, beneficial ownership structures, family member details, sometimes medical (insurance). High individual-impact → ICO breach notification likely + reputational high. We design bespoke posture.
BEC on wealth transfers + Wire fraud prevention
Specific pattern: fraudster impersonates client instructed to redirect drawdown / fund transfer to a new account. Mayfair firms have lost millions on single BEC events. Callback verification workflow (anti-BEC standard) + finance mailbox monitoring + RM alert rules on 'payment detail changes'.
HNW personal data protection
High-net-worth client data belonging to Mayfair firms is high-sensitive: financial records, sometimes tax residency, beneficial ownership structures (Trusts). Article 9 special category applies for some clients (immigration / philanthropic status). Restricted-IPM mailboxes + retention controls.
High-touch ICO breach retainer
Reputational risk of public HNW breach is significant. We support time-critical detection, controlled notification (where legally required), PR-aligned customer comms drafted in a discreet manner fit to Mayfair clientele. Fixed-price retainer + activation fee.
How we work
Scoping (Week 1)
Confirm FCA status (or family-only / private office), key client data types, portfolio + KYC vendor stack, BEC exposure patterns, current M365 / Entra posture.
Deploy (Week 1-2)
Connect M365 / Entra to Gridisys SOC. Conditional access: MFA everywhere, deal-team mailboxes restricted, deal funding flows monitored, OAuth grants on portfolio systems audited.
FCA + ICO + BEC playbook (Week 2-3)
Document FCA operational resilience evidence. Implement BEC callback verification workflow for client fund transfers. ICO breach retainer signed.
Operate (ongoing)
24/7 monitoring + monthly principal reporting + on-call for BEC / ransomware triage + annual SMF report ready for FCA.
Sectors we protect
Cybersecurity consulting that protects Mayfair's HNW client data
Free 30-minute consultation for principals, CIOs and ops leads at Mayfair wealth + family office firms. We scope FCA operational resilience, HNW data protection posture, and BEC prevention workflow.
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