Eon plans to cut 500 jobs, around 5% of its UK workforce.
The company said the redundancies would be made in non-customer facing roles.
CEO Michael Lewis said the cuts were due to an increasingly competitive environment. He singled out the forthcoming price cap on tariffs as a contributory factor.
Eon is trying to cut out about £100m of cost from its operations over the mid-term.
Lewis said redundancies would be “voluntary wherever possible”.
See the announcement here.