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We offer a full suite of electrical design service including:

· HV/MV System Engineering ·

· Power System Studies ·

· Protection Coordination ·

· Tender Support ·

· Interface Design ·

· Design Quality Assurance ·

· CAD Services ·

· Technical Documentation ·

All to our 4-point EDDA system.

For details click below.


With hundreds of projects completed for public and private sector clients we have delivered full generation site designs, HV substation upgrades, technical documentation, quality assurance and everything in between.


Take a look at a small selection of previous projects that illustrate the kind of services we can offer.


Our commitment to total customer satisfaction has helped some of the UK's leading organisations to achieve their goals.

· DNOs ·

· ICPs ·

· Industrial ·

· Data Centres ·

· Utilities ·

· Rail ·

Click below to see a selection of our more recognisable and repeat clients.


Who We Are

In 2006 a group of industry professionals recognised that the engineering and design capability of the UK's DNOs was stifled by overly prescriptive practice and ill-equipped to meet the mounting challenges in the quickly changing sector. OTSIB was established with the aim of disrupting this practice and supplying project-driven, high-quality design output, meeting stringent regulatory standards whilst providing much needed flexibility in an increasingly dynamic energy landscape. 

The team brought together over a hundred years of engineering, design, project management and draughting expertise from diverse backgrounds including generation, nuclear, transmission & distribution, protection & control, rail and aerospace. This depth of knowledge and scope of experience has allowed OTSIB to expand beyond DNOs, support clients in any industry needing high quality power engineering, instil confidence, drive innovation and deliver exceptional results year on year.  

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