Morris had held his role at the OU since 2007, and had previously worked as an e-commerce manager for Blackwell Publishing and Santander bank.
Just over a year ago, the charity enjoyed significant coverage as it was at the centre of an unprecedented social media frenzy in the shape of the Ice Bucket Challenge. The phenomenom raised £7.1m for the charity, a major boost given its income the year before had been £16.8m, as PRWeek's sister title Third Sector reported.
Morris, who is based at the charity's Northampton office, said: "It’s my first role in the third sector and I am looking forward to tackling the challenges all charities face. It’s an exciting time to join the association, which has been building on the impetus and impact of the Ice Bucket Challenge in 2014 across England, Wales and Northern Ireland.
"The association already has strong core values on which it bases its campaigning and I look forward to help drive this forward with new digital innovations that back our vital fundraising aims and also our work supporting our network of volunteers."
The charity's CEO Sally Light said Morris' digital expertise was "vital as we continue to meet the modern challenges of sharing information".