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"expert in" vs "expert on"

Both 'expert on' and 'expert in' are commonly used prepositions when talking about someone's expertise. The choice between them depends on the context and the verb that follows. 'Expert on' is usually followed by a specific topic or subject, while 'expert in' is followed by a broader field or area of knowledge.

Last Updated: March 29, 2024

expert in

This phrase is correct and commonly used in English when followed by a broader field or area of knowledge.

Use 'expert in' when referring to someone's expertise in a broader field or area of knowledge. For example, 'She is an expert in the field of medicine.'

Examples:

  • He is an expert in computer science.
  • She is an expert in the field of psychology.
  • They are experts in the automotive industry.
  • The team is expert in data analysis.
  • She is an expert in international relations.

Alternatives:

  • proficient in
  • specialist in
  • well-versed in
  • skilled in
  • knowledgeable about

expert on

This phrase is correct and commonly used in English when followed by a specific topic or subject.

Use 'expert on' when referring to someone's knowledge or proficiency in a specific topic or subject. For example, 'He is an expert on climate change.'

Examples:

  • She is an expert on ancient history.
  • He is an expert on digital marketing strategies.
  • They are experts on environmental sustainability.
  • The professor is an expert on quantum physics.
  • She is an expert on European literature.

Alternatives:

  • knowledgeable about
  • proficient in
  • specialist in
  • well-versed in
  • skilled in

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