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expert on vs expert in

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 • 1672 views

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.

Show examples from the web [+]

I don't know why I'm considered such an expert on chance.
My husband's an expert on bricks.
He's the expert on this.
I need an expert on tropicals.
Relationship advice from Holli Vavasour, the expert on boys.
Bishop's our expert on black helicopters.
Well you are the foremost expert on alien technology on this planet.
Since we last met, I became an expert on Tyler Brennen.
I'm an expert on poisons, Watson.
I have just been talking to an expert on internal security from Europol.
(Ariel) Leopold's an expert on Italian art.
He really is a certified expert on growth strategy.
No, but he's an expert on electrics.
I'm a big expert on deadbeat dads, So...
Like you're an expert on love.
You're the expert on manufactured living.
I happen to be an expert on feminine psychology.
Well. And you're an expert on women.
I'm an expert on a lot of things.
Guy next door to him used to be an expert on skelter beetles.

Alternatives:

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

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.

Show examples from the web [+]

I am an expert in forensic computer data analysis.
A vast supply of diamonds manipulated by an expert in light refraction.
He is an expert in covert operations.
You're the expert in singing.
I'm an expert in the field.
She's an expert in loony extremists.
Juliette, I'm not exactly an expert in these things.
I'm expert in lots of things.
Dr. Peter Prentice was "an expert in medicine but a novice in love...
And an expert in what she wants, obviously.
His target is always the expert in the repsective discipline.
Stefan who's an expert in history.
I meet an expert in counter-insurgency.
All we need now is an expert in gibberish.
Goodman is an expert in religious iconography.
You're an expert in comic books and yakuza films.
I consulted an expert in social theory before coming to see you.
I'm the expert in balloons.
We need an expert in computers to look after the technical end.
I'm the expert in alien technology.

Alternatives:

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

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