I worked for Steria in a non technical capacity on thier grad programme for 3 years and now work for one of the big4. Although working in IT services/System Integrators is a good route into consulting, I'd agree that perhaps a role in Capgemini, ACN or the likes would provide traction and a faster route up the channel. Eitherway you have done well and am sure will find a route into proper MC in the future, good luck.