The process is an extension of the company’s digital and creative reviews, which kicked off earlier this year.
The incumbent on the account is The Media Shop Scotland, based in Glasgow.
SSE includes the suppliers Southern Electric, Scottish Hydro and Atlantic, and is seeking a media agency to work on its activity amid new rules for the energy industry.
The Scotland-based shops Leith and The Gate currently handle SSE’s advertising, while Communicator Corp works on its digital activity.
SSE was fined £10.5 million by the energy regulator Ofgem in April for breaching rules that led to customers being mis-sold energy deals.