THE managing director of a company that grew into the largest advertising agencies in the North East is leaving after nearly three decades with the company. Andrew Marwick joined Newcastle-based Robson Brown as the controller of accounts in 1984 and rose through the rank to become client services director and then managing director in 2006. Marwick, which is one of the most experienced regional marketing and advertising executive, is considered resigned to pursue other business interests including consulting. Robson Brown Mission Group owner does not want to appoint a new director and said the company continues to be run by a management team remaining. CEO of mission officials ThinkBDW son Robert Day said: "We are very successful at it before the covenant with the team, bringing in £ 1m worth of business during the first two quarters, and Andrew has become a powerful force setting the business strategy and objectives. We have a strong management team that will continue going forward to do business. Teams will look to deliver the ambitious growth plans. ' Marwick led the company through a period of strong growth with an annual turnover of £ 38m and then after it has been sold by founder Stuart Robson and Alan Brown for U.S. companies for the years ended Round2 the business went administration after a new owner that is used as a holding company for two acquisition. Then he reappointed as managing director when the company was bought by London-based management of the Mission Group at the end of last year. He has overseen latest chapter in the life of 27-year-old with the expansion of the company's digital business. He said he wanted to see the company to its former glory and win new clients, even with smaller work force than succeeded to the title company.