ONCO SES LTD is a family run business that was established in 2020 by company director Callum O'Neill, a qualified electrician with 13 years experience in the industry. There are more than 50 years experience across ONCO's workforce in the electrical industry, ranging from household domestic electrics up to directorship in one of the worlds leading Exhibition event companies. 

Callum is City and Guilds qualified which a multitude of experience in Electrical Operations Management, Electrical Foreman, and Labour Management inclusive of electrical installation. Callum was previously an Electrical Operations Manager for Freeman EMEA working all over the world.

As a company, we are fully dedicated to client satisfaction. In all that we do, we strive to work meticulously and with integrity in order to provide high-quality results in all our projects.

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We're NAPIT approved!

Being a NAPIT certificated scheme member means we have demonstrated our competence, we hold the necessary insurances and have the right processes and procedures to assure compliance. Being a NAPIT registered installer means we are able to complete work safely and to legally required standards.