The phrase "possess expertise" is correct and usable in written English. It is often used to indicate that an individual has a certain degree of proficiency or knowledge in a certain field. For example: She possesses expertise in computer programming, which makes her an ideal candidate for the position.
People may not be conversant in the sport of politics, but they do possess expertise in spades.
When you have so little expert opinion on your side of the argument, I suppose your only recourse is to trash the very notion that anyone can possess expertise about anything.
We've got to come up with a global alliance of democracies to embody democratic ideals, harness U.S. military power and house a permanent nation-building apparatus, filled with people who actually possess expertise on how to do this job.
At Genentech, Gentleman looks for candidates who possess expertise in the biology of a particular disease.
Purposive sampling was employed to identify potential participants who possessed expertise in the design of interior textile products.
The research team members possessed expertise in health service research, psychology, medicine and living with an SCI.
8 Laser surgery in each group was performed or supervised by a single surgeon who possessed expertise in laser therapy.
Awesome tool! I started using it one year ago and I never had to look for another app
Ha Thuy Vy
MA of Applied Linguistic, Maquarie University, Australia