The group's pre-tax profit rose from £1.1m in 2010 to £1.4m this year. Turnover also increased to £10.7m, from £8.4m the previous year.
DRP gained 27 new clients this year including Oxfam and Birdseye and acquired web development and mobile app specialists MS Internet.
The agency also took on 35 new team members and invested alomst £1m in technical equipment and IT infrastructure.
DRP managing director Dale Parmenter said: "In the face of some very difficult trading conditions, we've been able to invest on infrastructure and people to increase capacity to keep us on track for this record year. With budgets working harder than ever, our focus has been helping our clients cut their costs, delivering highly cost effective events. This has helped us maintain our client relationships, increase the projects we've been delivering for them and work with a whole host of new businesses this year."
He added that 2012 will bring a heavy focus on CSR.