Citizens Advice Scotland are a hugely important, long term client of Pulsion dating back to the design and implementation of the original CASTLE system in 2005. Initially designed as a Case Recording and Management system. Following the successful completion and launch of the CASTLE system, Pulsion have worked with CAS to further enhance and support the application in a number of key areas. These include the Spiffy Link database integration in 2009 and the Pension Wise initiative in 2015, as well as infrastructure, SQL Server and Microsoft .NET Framework upgrades to improve the underlying operational hardware and technologies upon which the CASTLE system was built.