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STI has been manufacturing complex electronics products in the UK for over 30 years.

We have an outstanding reputation for supporting high-reliability industries such as aerospace, defence and oil and gas exploration which present the most complex technical challenges in our field, often requiring the development of new techniques to support our customers’ needs.

We understand that when you choose us as your electronics solutions partner, you’re putting trust in our capabilities. Quality is our watch word. Your products must be reliable and trusted by your customers. We have built our processes to provide you with a top quality and innovative end-to-end engineering service.

World-class manufacturing and test facilities.

STI provides its customers with world class manufacturing solutions. We are constantly improving our capabilities and investing in high technology equipment through the careful monitoring of technology and market trends. 

Our facilities are acknowledged as some of the most technically advanced in Contract Electronics Manufacturing (CEM).

STI is a specialist PCBA manufacturer but we also produce LRUs, sub-systems, and full systems including integration and configuration.


  • Surface mount assembly
  • Conventional through-hole assembly
  • Wavesolder and Selective Solder
  • Coating and Encapsulation
  • BGA re-balling and specialist modifications
  • State-of-the-art screened RF facility
  • Electrical mechanical assembly
  • Cable manufacture
  • Advanced box-build and LRU capabilities
  • Full rack wiring and integration
  • System integration and configuration


  • HF/RF test solutions
  • Automated Optical HD Inspection
  • In-Circuit, Flying Probe and Functional Tests for PCBAs
  • Environmental/ESS/HALT/HASS
  • X-Ray and XRF analysis and micro-section
  • Bespoke test design and development
  • Specialist test facilities:
    • RF Testing and RF alignment
    • Anechoic Chamber
    • EMC Chamber and 6-degrees of freedom test bed 

Read more about our manufacturing capabilities at each of our facilities:

01 Capabilities

Surface Technology International (STI) provides a full end-to-end engineering service - with integrated design, engineering and manufacturing support we will help you realise your product.