He works in a company in which there is a restaurant that sells alcohol and pork

No File Exists
Check below answers in case you are looking for other related questions:
Can Muslims settle in kaafir countries for the sake of a better life?
Boycotting the products of kuffaar who are hostile towards Islam

No File Exists
Related Answers:
Working for a company that cheats, and the ruling on working in a company in which some things are permissible and some are haraam
Ruling on working as an engineer for an airline, when his work includes playing music and video clips; what is the ruling on his salary?
Ruling on fixing TVs and VCRs
Can Muslims settle in kaafir countries for the sake of a better life?
Boycotting the products of kuffaar who are hostile towards Islam

Recommended answers for you:
When is the time for reciting Soorat al-Kahf on Friday?
When is it permissible for a woman to uncover her face?
Names whose use is forbidden
Guidelines on women working outside the home
Ruling on music, singing and dancing