An independent controls house.

Prizm Technical Services is a UK controls engineering company. We design, write, commission and support Siemens TIA Portal control systems — as a direct partner to end clients, and as a dependable subcontractor to systems integrators.

Our background is high-throughput material handling and logistics automation: sortation, conveying and warehouse systems where downtime is measured in missed parcels per minute. That environment teaches habits that carry into every project — software written to be read, testing done before site, and changes recorded as they happen.

We stay deliberately small and senior. The engineer who scopes your work writes the code, stands on the plant floor at go-live, and answers the email afterwards.

How we work

• Scope honestly — we only take work we’d stand behind, and we say so when something isn’t needed.
• Write for the next engineer — consistent structure, meaningful naming, documentation that survives handover.
• Test before site — simulation and FAT discipline, so commissioning confirms rather than discovers.
• Keep production first — cutover plans sequenced around output, with rollback points rather than leaps of faith.
• Automate the repetitive — we build our own tooling, because discipline scales better as software.

This site sets out how we work, not who we work for. Client names and project details are shared in conversation, where they belong.