ONCO SES ltd is a family run business that was established in 2020 by company director Callum O'Neill, a qualified electrician with 12 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.

Electrical Construction Plans
Domestic Installer

Our Electricians

Are friendly and reliable skilled contractors, who have years of electrical experience and knowledge. You can always expect the best quality of work.