She joins as associate director (London) and will have a number of agency-wide sector and management responsibilities, said Acceleris. Her appointment comes as the agency says it will record revenues in excess of £1m in 2014.
Hobson will report to Acceleris board director and head of PR Louise Vaughan.
Acceleris managing director Peter Davenport said: "This appointment is a clear statement of our ambition to develop our London presence. Sandra is a highly experienced and respected PR and communications professional with an impressive track record of achievement.
"In her previous role, among other things she led on two flagship integrated campaigns in the food sector with full responsibility for strategy and creative development, digital and social media activity as well as consumer and trade PR and blogger outreach programmes."
Hobson said: "There is a real energy and ambition about Acceleris that is evident not just in the work the agency does but in the way it does it. It makes me very excited to be joining the team at this important time in the future growth and development of the agency and I aim to play my full part in achieving those objectives."
Vaughan said: "The appointment of Sandra strengthens an already experienced and talented team and brings in new areas of expertise and knowledge to the agency. Although we only opened in London earlier this year, recruiting new staff and relocating others, it has already proven to be successful and this development will give it greater impetus."