主题：俺的英文履历书，求河里大侠指教，十万火急！！ -- simplyred

What type of job are you applying for? It looks like you had mechanical engineering background / experience but you were also a journalist? And you're applying for a procurement job?

As others pointed out, do not use 'purchaser'. I wouldn't use 'buyer', either. The common title here in the States is ‘procurement manager’, ‘purchasing manager’, or ‘procurement specialist / analyst’, ‘supply management specialist / analyst’.