Can he change his stream from civil engineering to general management or supply chain management for higher studies abroad?

Yes, you can switch from civil engineering to general management or supply chain management for higher studies abroad.

Most universities accept students from diverse undergraduate backgrounds into management programs. Typical requirements include:
- Bachelor’s degree in any discipline (including engineering)
- Relevant work experience (often preferred or required)
- Standardized test scores like GRE or GMAT (varies by program)
- English proficiency through IELTS or TOEFL

With five years of work experience, you are well-positioned for these programs. Emphasize your transferable skills, such as project management and analytical abilities, in your applications.