No, he cannot be a local director of your company when he is under employment pass (EP) of another company.
Suggested Readings
Can I apply for an Employment Pass prior to incorporating my Singapore company? Why do I need to appoint a resident director?
Can I become a director of other companies while I am on Employment Pass (EP) for one company?
Can an existing Employment Pass holder be a director of another company in Singapore?
Can I apply for a Letter of Consent prior to incorporating a Singapore company? Why do I need to appoint a resident director?