Expertise
Expertise has obvious roots in the word expert. Just about any interest or field has a place for experts. Just as one individual has expertise in world religions, another may have expertise in computer gaming. Working hard or immersing yourself in a speciality leads to expertise, and it comes through both study and hands-on experience [Vocabulary.com].
Expertise is the activity of expert specialists who have the appropriate qualification certificates and, on behalf of the customer, provide reports on the compliance of design solutions with the requirements of legislation, state regulations, standards, building regulations, and rules, and who are responsible for the reliability of the reports provided [Bitlex].
Expertise. Vocabulary.com. Retrieved from: https://www.vocabulary.com/dictionary/expertise
Expertise. Bitlex. Retrieved from: https://www.bitlex.ua/uk/blog/terms/post/ekspertyza