Hall County Fire Services has promoted a brigade commander to the post of deputy fire chief. Mark Arnold, a 28-year veteran of the department, was named deputy fire chief and will take the position immediately, according to a news release from the department. “Chief Arnold leads by example, has a wealth of technical and administrative ability, the highest of moral character, a history of mentoring others and fostering cooperation of co-workers and is focused on improving the department throughout all divisions,” Fire Chief Jeff Hood said in a statement.