Calypso Business Analyst

My client has a requirment for a contract Calypso Business Analyst. The Calypso specialist will have worked on previous Calypso upgrades and implementations for Front Office. Experience within a derivatives environment would be beneficial but the Calypso knowledge is a must. The candidate must be able to communicate with both front office business and pass these on to the Calypso team.
The client is an investment bank and the role is base in London paying competetive rates.