Fractional & on-demand CTO · London

Fractional CTO in London, built and run.

I build the technology your business runs on. Then I run it. Fractional, interim or on-demand, without the cost of a full-time CTO.

Built, not advised.

The audit is the front door. A paid read on what to build and what it costs, credited to your first month if we go further.

I don’t advise. I build it, and I run it.

Consultants hand you a strategy and leave. Agencies ship and move on. I do the opposite. I build the technology your business runs on, then I stay and run it, so it keeps working long after the invoice.

One senior operator, accountable end to end. You see it working every week. No mystery timelines, no hourly meter, and no team for you to manage. There is no lock-in. You stay because it works.

What a fractional CTO actually does.

A fractional CTO gives you senior technical leadership part-time. In my case that means more than direction. I audit the technology your business runs on, build what is missing, test it, hand it over live, then I run it. One person accountable for the whole thing, not a strategy deck and an invoice.

Why London businesses hire a fractional CTO.

You have paid an agency and been handed something that broke when they left. You have bought a strategy instead of a working system. You have managed developers who each rebuilt what the last one started. None of them owned the outcome. That is the gap I fill.

London understands fractional leadership. What it is short of is a fractional CTO who builds the thing, not just advises on it.

Kevin Mack in London, in a houndstooth coat beside a Rolls-Royce

Fractional CTO services, from audit to live handover.

The track record

I built a national industry from the ground up, and the technology that scaled it.

150+
Live exhibitions, conventions, summits and festivals. Designed, built and run nationally.
A$60M+
Revenue generated and managed across those events. Real budgets I grew and answered for.
15+ years
Executive leadership as both CEO and CTO. The owner’s seat and the technical seat at once.

The Program Method - Seven steps, and you watch every one.

Audit, Proposal, Access, Build, Test, Handover, and live and yours. The same process every time, on a dashboard you can see. No mystery timelines.

In progress

The Program Method

Your build · Custom platform

Step 4 of 7

  1. 4
  2. 5
  3. 6
  4. 7

Recent activity

  • Proposal approved6 days ago
  • Access granted to your systems4 days ago
  • Build in progressstarted 3 days ago
  • Next up: Test

A preview of the dashboard every client watches. You follow the build step by step, so you always know where it stands.

What does a fractional CTO cost?

Every engagement starts with a paid audit. It is the entry point and the answer: a fixed read on what to build and what it costs, credited to your first month if we go further.

Audit

the diagnostic · fixed · credited to what comes next

The fastest way to find out if I can help. I assess your systems, your AI, your tooling, and give you a one-page plan with the highest-value moves ranked. Plain English, no sales deck. Credited to your first month.

£400

Questions - The questions owners actually ask.

  • What is a fractional CTO? Part-time senior technical leadership. A CTO’s experience across strategy, architecture and delivery, without a full-time salary on the books. In my case, one who builds the technology rather than only advising on it.
  • Fractional, interim or virtual CTO, what’s the difference? Different labels, largely the same role. Interim usually means full-time cover for a fixed period; fractional and virtual mean continuing part-time leadership. Either way it is one accountable person instead of an agency.
  • Do you write the code, or just advise? I build it. Most fractional CTOs and consultants deliver strategy and stop there. I audit your technology, build what is missing, test it, take it live and then run it. That difference is the entire offer.
  • What does a fractional CTO cost? It begins with a fixed-price Program Audit at £400, credited to your first month if you continue. Ongoing work is a monthly retainer scoped to your needs, not billed by the hour.
  • Can you support a London business as a remote fractional CTO? Yes. The model is remote and on-demand, so I work as closely with a London team as an in-house lead would, without the full-time cost, and structure the engagement around your working hours.
London skyline

Built, not advised.

One architect, end-to-end.

A fractional CTO for London businesses, from audit to live handover.