House joins RSA from her role as head of e-experience at Sky.
She will be responsible for all marketing communications, digital, brand development and events across RSA's Affinity, Commercial and Personal Lines Broker channels, as well as direct insurance brand More Th>n.
House, a former Direct Line marketing manager, has occupied several roles at Sky, including director of customer retention and head of marketing for Sky Partnership products.
She is the latest addition to RSA's new Marketing Centre of Excellence structure, led by chief marketing officer Pete Markey. Former Capital One marketing head Dominic Grounsell will lead a personal marketing team, encompassing More Th>n, while Markey will oversee a commercial marketing unit.
Markey said: "[House] will play an integral part in building our Marketing Centre of Excellence, which supports both the UK business and overseas markets. We have big plans going forward, and with Hannah's expertise and knowledge, we know we can achieve our future goals and ambitions."