The DeKalb Board of Education hired a Washington DC-area consulting firm at its regular meeting Monday night, with the goal of eliminating inefficiencies and saving tax money. The firm, Management Advisory Group Inc., was awarded a contract worth up to $175,420. It will examine every job and salary of all 15,000 school employees, starting with the central office. Superintendent Cheryl H.L. Atkinson said that the firm work will begin almost immediately and the first phase of the work will be done in January and the second phase will be completed in March.