Good Command of English, could use English as working language.

有较好的英语听说读写能力，英语可以作为工作语言。

youdao

Be able to use English as working language, fluent written English.

能够以英文为工作语言，流利书面英语。

youdao

The range of gap packages starts with backpacking, includes working with charities, building hospitals and schools and, very commonly, working as a language assistant, teaching English.

学业间断年期间的一整套活动从背包旅行开始，包括和慈善团体一起工作，修建医院和学校，以及常见的做语言助教教英语。

youdao

The first to move east were the most international European companies, which tended to use English as their international working language regardless of their base.

ECONOMIST: It turns out to be English

Yong Nam, the chief executive since 2007, has hired non-Koreans to run marketing and procurement, and proclaimed English as LG's working language.

ECONOMIST: LG v Samsung

As the biggest pieces of the president's health care overhaul law are phased in this year, New York state officials are working on a strategy for making sure that people who speak English as a second language aren't left out.

WSJ: Immigrants factor in NY health care overhaul