Expertise is a word that means being really knowledgeable and skilled at something. It's when you know a lot about a specific subject or have a talent or ability in a certain area. Full definition
I believe my areas of expertise in software configuration, equipment maintenance, and anomalies testing will be of great benefit to the company. (jobhero.com)
This approach makes use of expertise of in house specialists in the form of teachers and teaching assistants. (hundred.org)
One group is comprised of individuals with expertise in areas such as training, organization development, and human resources, who are coming from corporations and consulting firms. (idaabbott.com)