Case study · Regulated financial services · Wealth & pensions · Switzerland

A real engagement, client anonymised. Figures measured with the client and rounded; not audited by a third party.

A 120-person financial firm brings all 68 of its AI uses under clear rules in four and a half months

An inventory of AI use, rules matched to risk, approved tools with controlled access, and approval within 48 hours for simple uses.

Scope and limitations

Rounded figures. A real engagement: the client’s name and any detail that would identify it have been removed.

Engagement summary02 / 04
Company
Swiss regulated financial services firm (wealth management and pensions), around 120 people
Scope
Generative AI use across the whole company, and the data passing through those tools
Software in place
Microsoft 365 and business applications; no AI tool chosen by the company
Starting point
Consumer AI tools used everywhere, with no inventory, no rules and no approval
Duration4.5 months
Period2025–2026
Team2 Numezis consultants + external counsel + 1 client lead

Consumer AI tools had spread through the teams without a single decision being made: drafting letters, summarising client files, preparing analyses. Nobody knew who was using what, or with which data. Then an employee pasted a client’s data into one of these tools. The incident was caught just in time, but it showed that the risky path had become the default.

Management’s first instinct was a total ban. That would have solved nothing: use would have moved to personal phones, out of sight, and the firm would have lost what these tools were genuinely contributing. The board was not asking for a charter: it wanted proof that use was under control, in a business where pension data leaves no room for approximation.

The question asked

Ban everything and lose the useful work, or set rules and make the safe path faster than the workaround?
01

Financial regulation and data protection

A regulated business handling personal data under the Swiss data protection act: every usage rule had to be written, traceable and defensible, not a mere recommendation.

02

Pension data

Clients’ pension data is among the most sensitive the firm holds. Exposing it to an unapproved tool was the first scenario to rule out.

03

A board that wants proof

A signed policy was not enough: the board asked for an inventory, controls, logs and indicators reviewed on fixed dates.

04

No habit of IT risk

The firm managed its financial risks rigorously but had no written practice for the risks of digital tools. The rules had to be ones the teams could own, not ones imposed on them.

What we put in place

Two deliverables: usage rules and the tools that make them real. One principle from the first day to the last: every use gets a risk level, every level gets controls to match, and the approved path must be faster than the workaround.

The building blocks

4 risk levelsEach of the 68 uses found is classified by the data involved and the consequences of an error or a leak
Controls by levelFrom simple awareness to strict prohibition, without weighing down low-risk use
Signed usage rulesShort rules signed by every employee: what is allowed, with which data, in which tools
Two-speed approvalUnder 48 hours for a low-risk use, a closer review for the rest: speed encourages people to declare
Approved tools, controlled accessSign-in with company accounts, role-based rights and usage logs, with no extra steps for the user
Monthly dashboardUses, approvals, incidents and deviations, presented to management every month: the proof the board asked for
01

Inventory and risk analysis 4 weeks

Team-by-team interviews and observation of real practice: 68 generative AI uses found, the data involved identified, leak and error scenarios described.

02

Rules and controls 4 weeks

Uses classified into four risk levels, controls per level, usage rules drafted with external counsel, sign-off by management.

03

Approved tools go live 6 weeks

Approved tools available with company accounts, role-based rights, usage logs, two-speed approval in operation.

04

Training and handover 4 weeks

Training by role (users, approvers, management), internal publication of approval decisions, first full dashboard, follow-up taken over by the client.

Safeguards6
  • Permitted uses defined by risk level
  • No client data in an unapproved tool
  • Approval within 48 hours for a low-risk use
  • Usage logs reviewed every month
  • In an incident, who alerts whom and how fast is written down and named
  • Quarterly review of the rules with management

Measured results

At the start there was nothing: no inventory, no controls, no approval route. The figures below measure what the rules made visible and then brought under control, including six months of use after go-live.

BeforeAfter
AI uses found068
Uses covered by a suitable control0%100%
Approval time for a new low-risk useno route< 48 h
Estimated use outside the rulesstart−80%anonymous internal survey

Rounded figures. A real engagement: the client’s name and any detail that would identify it have been removed.

Every study also says what could have been done better.

  1. 01

    Train before delivering the tools, not after. Teams knew approved tools were coming and the wait caused frustration; training during go-live would have turned that delay into preparation.

  2. 02

    Bring in counsel at the inventory stage, not only when drafting the rules. Two rounds of rework would have been avoided had the legal constraints guided the classification from the start.

  3. 03

    Publish approval decisions from day one. We started mid-engagement, and that openness is what got the approval route adopted: everyone could see it decided quickly, and why.