Transition Management

CLIENT British Gas
SECTOR Utilities
FRAMEWORK TITLE Transition Management
CONTRACT MODEL Data Processing (DC & DA and MOP & MAM)

Scope of Delivery

Transfer Data Management processes from incumbent to Callisto

12.5 million targeted within a three-month period

Manage transition without degradation of services

Retain level of industry expertise – essential given complexity of services provided

Complete exercise on time, maintaining quality standards and within financial budget

Key Aspects of Delivery

Very thorough planning and project management and governance

1:1 engagement with incumbent’s staff – won their hearts and minds – set up of office close to their work location, successful TUPE exercise

Careful monitoring of system performance and intuitive reporting against progress – swift rectification action where needed

Recruitment, training and mentoring of new staff executed in an exemplary manner

Close working with client and incumbent against common goals to ensure smooth transfer


12.5 million records transferred without significant issues

Project completed on time and on budget


"In 2013, we increased the meter reading and data services from half of the country to a national arrangement with Callisto. The data migration required to enable the roll out of the services was the largest in the indsutry. Throughout the process, high levels of data processing and settlement performance were maintained, and the low levels of exceptions seen for a migration of this size and complexity were beyond our expectations."

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using the latest technology.

Experts in settlement performance - since our market inception, we’ve consistently demonstrated an exemplary record, with a robust settlement process that complements our customers best practice for customer services and billing.

Ensuring data security is at the core of our operations. We ensure the integrity and security of customer information by designing security into our systems and processes. This is further supported through the use of secure data centres. 

Our Data Management services are delivered with a comprehensive quality assurance commitment. Business management processes are certified to ISO 9001 and information security management systems are certified to ISO 27001 providing complete security assurance.