Holder joins fellow partner Gavin Edwards and founder Warren Hutchinson at senior management level.
Working with clients at the beginning of projects, Holder will ‘conceive, create and deliver multi-channel consumer experiences across web, mobile and desktop,’ according to Someone Else.
The consultancy is looking to ‘build credibility and develop its client base’ says Holder, who will also help bring in new business.
Hutchinson set up Someone Else in spring 2011 and it shares office space with consultancy Someone.
Someone Else will mainly be working alongside Someone though – ‘to bring to bear a strong combined offering of brand and digital,’ Holder says.
Other staff will be brought into Someone Else on an ‘as-needs basis,’ he adds.