SEI provide a range of electrical testing and installation services to commercial, industrial and specialist industries. With nationwide coverage, our contractors pride themselves on delivering all our services to the highest level.

About us

Find out more about SEI and our dedicated team of contractors and specialist engineers.

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Want to work with us?

Find out more about our clients and the industry sectors we work in.

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Install and commission

Let us manage the process for you from brief to completion

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Testing and compliance

Stay compliant with regular safety and maintainence checks

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Security and Fire

Keep your staff and premises safe with security and fire systems

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    What our clients think

    DCI Electrical

    Richard Kerr, Operations Manager

    DCI wish to thank the SEI team for you exceptional work on the National Grid Substation Project. Your team's efforts were a significant contribution to the team accomplishing great results in an extremely time constrained project. Every last detail was done without any delay and to a high standard.

    SEI provides an excellent service to school responding quickly and flexibly to our needs. We highly recommend them.