"have a wealth of expertise" is an acceptable phrase that can be used in written English. For example, "Our team of researchers have a wealth of expertise in robotics.".
The troops' counsel is free and, as anyone who's ever worked with junior soldiers or Marines knows, they have a wealth of expertise and strong opinions they would be glad to express.
The Commission is composed of an impressive group of individuals who have a wealth of knowledge and a wide range of expertise and experience.
But most have a wealth of experience.
The Finns have a wealth of goalies.
He praised Balls, saying "he has a wealth of knowledge and expertise of economics, international finance and markets that the country will benefit from.
We want to make sure we get a wealth of expertise in science.
Guangdong has a wealth of tourist attractions.
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.
Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com