"has expertise" is correct and usable in written English. You can use it when referring to someone's ability or knowledge in a certain area. For example, "She has expertise in computer programming.".
He has expertise.
She has expertise on water quality issues.
She has expertise on water quality and air-pollution.
While Willis lacks power, he at least has expertise.
It also has expertise in running small supermarkets, which Future lacks.
The editor in chief of Glamour has expertise in media, publishing and fashion.
They feel like the guy next door has expertise in a field where they want it".
Thanks to Ludwig my first paper got accepted! The editor wrote me that my manuscript was well-written
Listya Utami K.
PhD Student in Biology, Bandung Institute of Technology, Indonesia