Powering Progress with Precision

Elevate Efficiency,
Ensure Reliability

With decades of experience, ONCO SES can guarantee the efficiency and reliability of every project we undertake, to ensure your electrical installations and services are safe and compliant.


We bring knowledge of the latest industry legislation and safety standards to guarantee peace of mind.


At ONCO SES we explain our services without jargon and our prices without additional hidden costs, offering complete transparency always.


With decades of combined experience, we offer some of the sector’s best-trained and highly qualified engineers.


We hold ourselves to the highest standards of excellence, meaning you can trust we have your best interests at heart.

Our Services

ONCO SES is proud to offer all our customers a complete range of services, from design and installation to maintenance, testing and inspections to keep your property compliant.


Whether your property is a new build and needs systems to be designed and installed, or an older building that needs new electrical services, our team is expert at designing and installing the perfect electrical service and systems on time and within budget.

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Proactive maintenance is the best remedy to prevent expensive and potentially dangerous issues with a property’s electrical services. By working with ONCO SES for your electrical maintenance needs, potential problems can be spotted and dealt with before they become a problem.

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Testing and Inspections

Vital for compliance, all electrical systems need systematic testing and inspection. ONCO SES has the required expertise to carry out all the testing and inspections your property and electrical systems need to ensure you meet your sector’s stringent legal requirements.

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Years of Experience

A Bit About Us

ONCO SES is a family-run business established and comprised of a team with over 50 years of combined experience in the electrical industry. Working in every conceivable sector, from domestic properties to vast commercial and industrial installations, we take great pride in the excellence of our work and the highest possible standard of customer service in all we do. Fully qualified, we are NAPIT (National Association of Professional Inspectors and Testers) certified contractors, and all our engineers hold DBS checks and health and safety qualifications alongside our rigorous electrical training.

  • 50+ years of experience
  • NAPIT-approved contractor
  • Health and safety trained
  • Turnkey services for all electrical needs

Case Studies

Explore our case studies for insight and inspiration, giving you confidence we can deliver exceptional electrical solutions for your unique needs.
Mango Store Bullring

Mango Store Bullring

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West Mercia Police

West Mercia Police

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Don’t Just Take Our Word for It

When you’re looking for a contractor, you want to know they’re the one you can trust.
Read what our previous clients have to say about our services, for unbiased opinions you can rely on.

Need Help?

Speak To Our Friendly Team

Our expert and friendly team is more than happy to chat with you about what you require for your electrical services. Get in touch to find out how we can help you today.

Get In Touch

Why not pick up the phone to chat with a friendly, expert member of our team? Alternatively, you can send us an email or fill in our contact form and someone will be in touch with you as soon as possible.

0121 227 8248


Contact Form