Turnover for the 12 months to 31 May 2014 grew from £7.1m to £7.8m for the company, which has five offices in Scotland and England.
The new board directors are Andrew Baird, who joined in 2012 from the Scottish Government as director of strategic comms; Bryan Garvie, who joined from the Irvine Times; and Sharon Mars, who started at Big from university.
Their promotions follow recent hires in the digital team, including Jessica McAndrew, former head of online marketing at Frame, and Alice Ritchie, ex-search marketing manager at DigitasLBi.
Big’s headcount in the last financial year increased by three to 105.
Big director Alex Barr said: "It’s been our best ever start to the year and we feel the market is definitely moving in our direction, with increasing synergies between content, digital and SEO/pay-per-click opening up real opportunities for clients.
"We have a very stable core of senior people and the latest additions to the board have each played key roles in our continuing growth. In the cases of Bryan and Sharon, who both joined us at a junior level several years ago, these appointments to the board also underline the tangible opportunities we provide for long-term career progression.
"We’re also accelerating the expansion of digital capabilities across the business and, combined with our long track record in delivering compelling editorial content, we’re helping clients reach and influence online audiences more effectively than ever."
Recent account wins for Big include the Scottish Professional Football League (SPFL), Scottish Rugby, coffee roaster Matthew Algie, and metal manufacturer and supplier Premier Hytemp.