MD：Marketing Department, 主要职责是负责校内外资源的整合与应用，撰写策划，支持并推广SESA的所有对外活动，是SESA的核心部门。我们有高颜值，高均分，高姿态但不做作，善于交际但不顽皮。对内，与工科院及各大组织社团建立良好交流关系，对外与各大公司企业，高校有着密切的联系，在沟通中向他们宣传并推广SESA的品牌文化及主要活动，是SESA的颜面担当。
Marketing Department. The main responsibility is integrating and applying the resource from UNNC and the society, writing the plan, supporting and spreading all SESA’s activities. As the central department of SESA, we have good-looking, high marks, lofty stance but not artificial, we are good at communicating but not naughty. In the school, we contribute good connection with institute of Engineering and the other student association, outside the school, we communicate with big company and university, while the communicating, we spread and publish the band culture and main activities of SESA. MD is the face of SESA.