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STI logo
  • Company
    Company
    • About STI
    • Our Team
    • Quality Assurance
    • Corporate Responsibility
    • Diversity and Equal Opportunities
  • Customer Focus
    Customer Focus
    • Customer Focus Overview
    • Our Markets
  • Insights
  • Careers
  • Contact

About STI

UK manufacturer of complex electronic systems.

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Who we are

STI transforms complex challenges into engineered certainty, by delivering full-system electronics that perform, integrate, and meet real-world demands.

STI is a UK electronics manufacturer specialising in complex, mission-critical systems. We work UK Sovereign accredited facilities in Hook and Poynton, where our teams engineer, build and test full-system electronics for defence, aerospace and security programmes. Our work ranges from PCB assembly and RF systems to wiring, cabinet build and complete integrated units.

We exist to give defence, aerospace & security customers total confidence in the electronics behind their most critical systems.

What we do

Our markets

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We work with defence, aerospace and security customers on programmes that depend on reliable electronic systems. Our teams deliver across land, air, sea and cyber, supporting applications such as sensing, communications and autonomous platforms.

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Our people

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Our culture is centred on capability, openness and accountability. The work we do is technically demanding, so we rely on clear communication, shared standards and a commitment to doing things properly.

Meet the team

Our facilities

Hook, Hampshire

Hook facility factory shot

PCB assembly, RF builds, wiring, full-system integration, environmental test and repair. Two high-speed SMT lines, prototype capability and dedicated test facilities.

Key stats
> 5,800m²
> SMT lines
> Environmental test chambers

Contact the Hook facility

Poynton, Cheshire

Poynton facility factory shot

Advanced systems build, cabinet and rack assembly, RF and antenna work, anechoic chamber, EMC testing and mechanical capability. Both sites are fully accredited and staffed by suitability qualified, experienced and skilled staff.

Key stats
> 697m² mechanical bay
> RF & antenna
> Anechoic chamber

Contact the Poynton facility

Our history

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1989

Founded

Company founded, early focus on high-reliability PCB assembly.

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2000s

Expansion

Expansion of test, RF and wiring capability. First major defence integrations.

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2010s

Two-site strategy

Establishment of systems build at Poynton and continued investment in environmental and RF test.

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Today

Transformation

A specialist UK provider of complex, mission-critical electronic systems with integrated engineering, build and test capability across two well invested facilities.

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Proud accredited members

We are active members of ADS Group and Make UK Defence. These relationships help us stay aligned with sector needs, skills development and wider industry standards.

Contact us

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Ready to deliver for you as your trusted partner.

Contact us

Proudly UK sovereign. All work delivered by qualified and experienced teams.

Company

  • About STI
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Registered Office: 4th Floor, 24 Old Bond Street, London, England, W1S 4AW. Registered in England Number: 02292621.
VAT Registration Number: 260 9861 81. © 2025 STI Limited. All Rights Reserved.

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