在职证明是申请美国签证所必需的文件之一，它需要雇主提供。

下面是一份可供参考的美国签证在职证明模板，供您参考。 英文版：

TO WHOM IT MAY CONCERN:

This is to certify that [full name of employee], is currently employed with [name of company] as a [position] since [date of employment].

His/Her current salary is [salary] per [hour/week/month/year].

Mr./Ms. [last name] is a valued employee of our company and we have no objection to his/her travel to the United States of America. We guarantee that he/she will return to his/her employment upon completion of his/her travel to the United States of America.

If you have any further questions, please do not hesitate to contact us.

Sincerely,

[Name of employer]

[Title of employer]

[Company name]

中文版：

致有关部门：

本公司证明，[员工姓名]，自[入职日期]以来一直在本公司任职，担任[职位]一职。

其目前的薪资为每[小时/周/月/年][薪资金额]。

[员工姓氏]先生/女士是本公司的一名重要员工，我们没有任何反对他/她前往美国的意见。我们保证他/她将在完成前往美国的行程后返回本职工作。

如果您有任何进一步的问题，请不要犹豫与我们联系。

此致

敬礼！

[雇主姓名]

[雇主职位]

[公司名称]

以上是一份可供参考的美国签证在职证明模板，希望能对您有所帮助。