“我非常想应聘贵公司的销售代表一职”英文怎么说？

I would very much like to apply for the post of a sales representative of your company.

I greatly desired to apply for sales marketing position of your company.

greatly desired 比very much like to 要强烈,要恭谨和诚意.

而且很少用 apply for the post of ...
因为apply for后面直接可以接名词了.
不用 ...的职业 那么复杂
这样的
这样很罗嗦,而且不符合西方人文化
一般这样用
How to Apply for a Position at the ...
Apply for a Position as a Taxi Driver
wish to apply for the position referred to..

I'm quite willing to apply for the sales representive position.
I have extraordinary interest in the sales representive position.

这样是最标准的, 说得天花乱坠是不切实际的. 这里翻译应该翻意思, 而不是单词翻译.

sales marketing position 没有这种说法.
或者是 sales, 或者是 marketing engineer/executive/officer

I am eagerly looking foward to applying for the the position of sales representative of your honour's corporation.

desired时态错.