Corechange beat off Oracle and Plumtree to the R&SA contract, which will be deployed across 50,000 desktops and used both internally and externally.
The company is claiming it is now positioned to beat Plumtree become the number one portal vendor.
"We are absolutely chasing Plumtree," Phil Garvey, Corechange UK managing director told CW360. "We are about six months behind them at the moment, but the world is changing very quickly at the moment."
Corechange has strengthened its relationship with Microsoft - something which Plumtree's European marketing director, Charlie Abrahams, recently told CW360 was crucial to his firm's ability to secure large corporate wins.
Corechange has recently attained Microsoft Managed Partner status in the UK and Garvey said: "Every second call to the office is from a Microsoft employee asking us to go and see a potential customer with them."
"The global portal is a key component for RS&A to move forward," said Rodney Promfett, global portal director at R&SA. The insurance giant decided to go for a global portal deployment to consolidate multiple existing in house portal projects.
Garvey estimated that the full deployment will be up and running within 12 months. However, he admitted that implementation would not be easy because of the number of projects that need to be integrated.