The company has a staff of 200,most of who are technologic workers.这句句子有没有语法错误?

The company has a staff of 200,most of who are technologic workers.这句句子有没有语法错误?
The company has a staff of 200,most of who are technologic workers.
这句句子有没有语法错误?

The company has a staff of 200,most of who are technologic workers.这句句子有没有语法错误?
who---whom