学生会外联部部长，用英语如何翻译？谢谢！

中文：学生会外联部部长
英文：The Union minister of Liaison Department

相关例句：
例句:
1.什么时候我让你做人事部部长了？
And when did I make you head of personnel?
2.麦寇部长会有问题吗?
Will secretary mccoy be a problem?
3.农业部部长？好主意！他们这周能上节目吗？
Secretary of agriculture? Good idea! Can they do it by this week?
4.为什么司法部长会在晚上打猎?
Why was the attorney general hunting at night?

director of liaison department/section of student union