I'm not sure about niche players in the IB/RB space, but there are several that focus on the Investment Management market:CSTIMCity ConsultantsKinetic...so onOf these, CSTIM has the broadest remit and is therefore probably at the front-end of business/strat consulting.If you are looking for IB consulting, your skills may be transferable to the Investment Management space as many of the large IM firms are gearing up to use derivatives - and the real experience in this area comes from an IB/sell-side background. Suggest you check out the websites of the above firms if you have consulting experience with IBs